I have no idea how to do this someone help me

I Have No Idea How To Do This Someone Help Me

Answers

Answer 1

1. 95% of the cookies weight between 686 and 704 grams.

2. The mean of the distribution is given as follows: 498 grams.

3. The standard deviation of the distribution is given as follows: 9 grams.

What does the Empirical Rule state?

The Empirical Rule states that, for a normally distributed random variable, the symmetric distribution of scores is presented as follows:

The percentage of scores within one standard deviation of the mean of the distribution is of approximately 68%.The percentage of scores within two standard deviations of the mean of the distribution is of approximately 95%.The percentage of scores within three standard deviations of the mean off the distribution is of approximately 99.7%.

For item 1, we have that 95% of the measures are within two standard deviations of the mean, hence the bounds are:

690 - 2 x 7 = 686 grams.690 + 2 x 7 = 704 grams.

For item 2, the mean is the mean of the two bounds, hence:

(489 + 507)/2 = 498 grams.

Hence the standard deviation in item 3 is given as follows:

507 - 498 = 498 - 489 = 9 grams.

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Related Questions

Find the area of the given triangle. Round your answer to the nearest tenth. Do not round any Intermediate computations. 36° 12 square units​

Answers

The area of the triangle is 52.32 square units

Finding the area of the triangle

from the question, we have the following parameters that can be used in our computation:

The triangle

The base of the triangle is calculated as

base = 12 * tan(36)

The area of the triangle is then calculated as

Area = 1/2 * base * height

Where

height = 12

So, we have

Area = 1/2 * base * height

substitute the known values in the above equation, so, we have the following representation

Area = 1/2 * 12 * tan(36) * 12

Evaluate

Area = 52.32

Hence, the area of the triangle is 52.32 square units

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The area of the right triangle is approximately 52.3 square units.

What is the area of the triangle?

The area of triangle is expressed as:

Area = 1/2 × base × height

The figure in the image is a right triangle.

Angle θ = 36 degrees

Adjacent to angle θ ( height ) = 12

Opposite to angle θ ( base ) = ?

To determine the area, we need to find the opposite side of angle θ which is the base.

Using trigonometric ratio:

tanθ = opposite / adjacent

tan( 36 ) = base / 12

base = 12 × tan( 36 )

base = 8.718510

Now, area will be:

Area = 1/2 × 8.718510 × 12

Area = 52.3 square units

Therefore, the area of the triangle is 52.3 square units.

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Add


3/5+7/8+3/10

Enter your answer in the box as a mixed number in simplest form.

Answers

The gcf of the denominators is 40, so after making that change to each fraction, the answer is 1 31/40
LCM of 5, 8, and 10 = 40, so

3/5 turns into 24/40
7/8 into 35/40
3/10 into 12/40

24/40 + 35/40 + 12/40 = 71/40

71/40 = 1 31/40

Answer: 1 31/40

Have a good day ^^

What is the probability that either event will occur?

Answers

Answer:

0.67

Step-by-step explanation:

show that the binary expansion of a positive integer can be obtained from its hexadecimal expansion by translating each hexadecimal digit into a block of four binary digits.

Answers

We can obtain the binary expansion of a positive integer from its hexadecimal expansion by translating each hexadecimal digit into a block of four binary digits this is because each hexadecimal digit represents a group of four binary digits, so by converting each hexadecimal digit into its binary equivalent, we effectively "unpack" the binary digits that make up the integer.
We need to first understand what these terms mean to show that the binary expansion of a positive integer can be obtained from its hexadecimal expansion by translating each hexadecimal digit into a block of four binary digits.

Binary digits, also known as bits, are the building blocks of binary code, which is a digital code that uses only two digits (0 and 1) to represent information. On the other hand, hexadecimal digits are a base-16 numbering system that uses 16 digits (0-9 and A-F) to represent numbers.

Now, to translate a hexadecimal digit into a block of four binary digits, we simply need to convert each hexadecimal digit into its binary equivalent using a table like this:

| Hexadecimal | Binary |
|-------------|--------|
| 0           | 0000   |
| 1            | 0001    |
| 2           | 0010    |
| 3           | 0011     |
| 4           | 0100    |
| 5           | 0101     |
| 6           | 0110     |
| 7           | 0111       |
| 8           | 1000    |
| 9           | 1001     |
| A           | 1010     |
| B           | 1011      |
| C           | 1100     |
| D           | 1101      |
| E           | 1110       |
| F           | 1111         |

For example, let's say we have the hexadecimal number 2AF.

To translate this into its binary equivalent, we would simply convert each hexadecimal digit into its binary equivalent using the table above:

2 -> 0010
A -> 1010
F -> 1111

So the binary equivalent of 2AF is 001010111111.

In general, we can obtain the binary expansion of a positive integer from its hexadecimal expansion by translating each hexadecimal digit into a block of four binary digits using the table above. This is because each hexadecimal digit represents a group of four binary digits, so by converting each hexadecimal digit into its binary equivalent, we effectively "unpack" the binary digits that make up the integer.

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Show how to implement the stingy algorithm for Horn formula satisfiability in time that is linear in the length of the formula (the number of occurrences of literals in it). (Hint: Use a directed graph, with one node per variable, to represent the implications.)

Answers

The time complexity of this algorithm is linear in the length of the formula.

The Stingy algorithm is a linear-time algorithm used to determine the satisfiability of Horn formulas. To implement the Stingy algorithm, we can use a directed graph with one node per variable to represent the implications. The graph is constructed by iterating over each clause in the formula and adding an edge from the negation of the first literal to the second literal of the clause. If a literal appears only in positive form, we can add a self-loop to its corresponding node.

Once the graph is constructed, we can perform a linear-time algorithm known as a depth-first search to determine the satisfiability of the Horn formula. Starting from any node in the graph, we mark it as visited and check its neighbors. If a neighbor has not been visited yet, we mark it as visited and continue the search recursively. If we encounter a node that has already been visited, we can stop the search and return that the formula is not satisfiable.

If we reach the end of the search without encountering a contradiction, we can return that the formula is satisfiable. The key advantage of this approach is that the time complexity is linear in the length of the formula (the number of occurrences of literals in it).

In summary, the Stingy algorithm for Horn formula satisfiability can be implemented using a directed graph with one node per variable and a depth-first search algorithm. The graph is constructed by adding an edge from the negation of the first literal to the second literal of each clause, and a self-loop to nodes that correspond to literals appearing only in positive form. The depth-first search algorithm is used to determine whether the formula is satisfiable or not, and the time complexity of this algorithm is linear in the length of the formula.

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A dress pattern calls for 1 1/8 yards of fabric for the top and 2 5/8 yards for the skirt. Mia has 3 1/2 yards of fabric. Does she have enough fabric to make the dress? Explain

Answers

To find out whether Mia has enough fabric to make the dress, you need to add the amount of fabric required for the top and skirt. Then compare it with the amount of fabric she has.

So, let's do that.To make the dress, we need 11/8 yards of fabric for the top2 5/8 yards of fabric for the skirt Total fabric required

= 1 1/8 + 2 5/8

= 3 3/4 yards

Mia has 3 1/2 yards of fabric

So, Mia does not have enough fabric to make the dress because she needs 3 3/4 yards of fabric to make it.

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How many decimal strings are there with length at least 4 and at most 7?

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Answer: To find the number of decimal strings of length at least 4 and at most 7, we can count the number of strings of length 4, 5, 6, and 7 and add them together.

Number of strings of length 4: There are 10 possible digits for each of the 4 positions, so there are 10^4 = 10,000 possible strings.

Number of strings of length 5: There are 10 possible digits for each of the 5 positions, so there are 10^5 = 100,000 possible strings.

Number of strings of length 6: There are 10 possible digits for each of the 6 positions, so there are 10^6 = 1,000,000 possible strings.

Number of strings of length 7: There are 10 possible digits for each of the 7 positions, so there are 10^7 = 10,000,000 possible strings.

Therefore, the total number of decimal strings of length at least 4 and at most 7 is:

10,000 + 100,000 + 1,000,000 + 10,000,000 = 11,110,000.

So there are 11,110,000 decimal strings with length at least 4 and at most 7.

To answer your question, we need to first understand what a decimal string is.

A decimal string is a sequence of digits, 0 through 9.

So, for example, 123 and 987654 are both decimal strings.

Now, we need to find how many decimal strings there are with length at least 4 and at most 7. This means that we need to count all the decimal strings that have a length of 4, 5, 6, or 7.

To find the number of decimal strings with length 4, there are 10 options for the first digit, 10 options for the second digit, 10 options for the third digit, and 10 options for the fourth digit. So, there are 10 x 10 x 10 x 10 = 10,000 decimal strings with length 4.

To find the number of decimal strings with length 5, there are also 10 options for each digit, so there are 10 x 10 x 10 x 10 x 10 = 100,000 decimal strings with length 5.

To find the number of decimal strings with length 6, there are again 10 options for each digit, so there are 10 x 10 x 10 x 10 x 10 x 10 = 1,000,000 decimal strings with length 6.

Finally, to find the number of decimal strings with length 7, there are 10 options for each digit, so there are 10 x 10 x 10 x 10 x 10 x 10 x 10 = 10,000,000 decimal strings with length 7.

So, to find the total number of decimal strings with length at least 4 and at most 7, we add up the number of decimal strings with each length:

10,000 + 100,000 + 1,000,000 + 10,000,000 = 11,110,000

Therefore, there are 11,110,000 decimal strings with length at least 4 and at most 7.

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3/4x+5=3/8 without fractions

Answers

x = -6.666666 repeating

Answer: x=-5.83..(repeated)

A farmer had 4/5 as many chickens as ducks. After she sold 46 ducks, another 14 ducks swam away, leaving her with 5/8 as many ducks as chickens. How many ducks did she have left?

Answers

Let's assume the number of ducks the farmer initially had as 'd' and the number of chickens as 'c'.

Given:

The farmer had 4/5 as many chickens as ducks, so c = (4/5)d.

After selling 46 ducks, the number of ducks becomes d - 46.

After 14 ducks swam away, the number of ducks becomes (d - 46) - 14.

The farmer was left with 5/8 as many ducks as chickens, so (d - 46 - 14) = (5/8)c.

Now we can substitute the value of c from the first equation into the second equation:

(d - 46 - 14) = (5/8)(4/5)d.

Simplifying the equation:

(d - 60) = (4/8)d,

d - 60 = 1/2d.

Bringing like terms to one side:

d - 1/2d = 60,

1/2d = 60.

Multiplying both sides by 2 to solve for d:

d = 120.

Therefore, the farmer initially had 120 ducks.

After selling 46 ducks, the number of ducks left is 120 - 46 = 74.

After 14 more ducks swam away, the final number of ducks left is 74 - 14 = 60.

So, the farmer is left with 60 ducks.

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Estimate the sum of 192 and 91 by rounding both values to the nearest ten. what is the best estimate of the sum?

280

290

300

310

Answers

To estimate the sum of 192 and 91 by rounding both values to the nearest ten, we round 192 to 190 and 91 to 90.

190 + 90 = 280

Therefore, the best estimate of the sum is 280.

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a proportion is a special case of a mean when you have a dichotomous population. true false

Answers

Answer:true

Step-by-step explanation:

a. How many integers from 1 through 999 do not have any repeated digits?
b. How many integers from 1 through 999 have at least one repeated digit?
c. What is the probability that an integer chosen at random from 1 through 999 has at least one repeated digit?

Answers

a. There are 648 integers from 1 through 999 that do not have any repeated digits.

b. There are 351 integers from 1 through 999 that have at least one repeated digit.

c. The probability that an integer chosen at random from 1 through 999 has at least one repeated digit is approximately 0.351.

How many integers from 1 through 999 have unique digits?

Learn more about the count of integers without repeated digits from 1 to 999.In a range from 1 through 999, there are 900 integers in total. To determine the number of integers without repeated digits, we need to consider the possible combinations. For the hundreds place, there are 9 options (1-9) since zero cannot be used as the first digit. For the tens place, there are 9 options again (0-9 excluding the digit already used in the hundreds place). Similarly, for the units place, there are 8 options available (0-9 excluding the two digits already used in the hundreds and tens places). Multiplying these options together, we get 9 * 9 * 8 = 648 integers without repeated digits.To calculate the number of integers with at least one repeated digit, we can subtract the count of integers without repeated digits from the total count of integers in the range. Therefore, 900 - 648 = 252 integers have at least one repeated digit.

To find the probability, we divide the count of integers with at least one repeated digit by the total count of integers in the range, resulting in 252 / 900 ≈ 0.351. Therefore, the probability that a randomly chosen integer from 1 through 999 has at least one repeated digit is approximately 0.351.

Among the three-digit integers from 100 to 999, how many of them have at least one digit repeated?

Out of the three-digit integers from 100 to 999, there are 351 integers that have at least one repeated digit. To determine this count, we subtract the number of unique-digit integers (648) from the total count of three-digit integers (900). Hence, 900 - 648 = 252 integers have at least one digit repeated.

If a three-digit integer is selected randomly from the range 100 to 999, what is the probability that it will have at least one repeated digit?

If a three-digit integer is randomly selected from the range 100 to 999, the probability that it will have at least one repeated digit is approximately 0.39 or 39%. This probability is calculated by dividing the count of integers with repeated digits (351) by the total count of three-digit integers (900). Therefore, the probability is 351 / 900 ≈ 0.39 or 39%.

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Find the approximate volume, in cubic centimeters, of the solid shown where h = 12 cm, s = 7 cm, and d = 8 cm. A. 218 cm3 B. 435 cm3 C. 603

Answers

The answer is c have a good day

-2+-6 in absolute value minus -2- -6 in absolute value

Answers

`-2+-6` in absolute value minus `-2--6` in absolute value is equal to `4`.

To solve for `-2+(-6)` in absolute value and `-2-(-6)` in absolute value and subtract them, we first evaluate the two values of the absolute value and perform the subtraction afterwards.

Here is the solution:

Simplify `-2 + (-6) = -8`.

Evaluate the absolute value of `-8`. This gives us: `|-8| = 8`.

Therefore, `-2+(-6)` in absolute value is equal to `8`.

Next, simplify `-2 - (-6) = 4`.

Evaluate the absolute value of `4`.

This gives us: `|4| = 4`.

Therefore, `-2-(-6)` in absolute value is equal to `4`.

Now, we subtract `8` and `4`. This gives us: `8 - 4 = 4`.

Therefore, `-2+-6` in absolute value minus `-2--6` in absolute value is equal to `4`.

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Given Rhombus ABCD, find x, y and z. Then find the perimeter

Answers

The perimeter of the rhombus is 34 units.

Given rhombus ABCD, the figure is represented as:

Rhombus ABCD, x= 7y+3, z= 4y-3

Find the value of y

First, we need to find the value of y. Since, the opposite angles of a rhombus are congruent, so,

∠DAB= ∠DCB

Now, x = 7y+3z = 4y-3

Adding both, x+z= 11y

By solving the above equation, we get,

y= (x+z)/11

On substituting the value of x and z in terms of y, we get,

x= (7(x+z)/11)+3z

= (4(x+z)/11)-3

On substituting x and z values in the given equations,

x= 17y/11+3z= 10y/11-3

Find the perimeter

Perimeter of a rhombus is given by,

Perimeter= 4a, where a is the side of the rhombus.

Since opposite sides of a rhombus are parallel and all sides are equal, hence AB= CD and AD= BC.

So,AB= 17y/11+3, CD= 17y/11+3AD= 10y/11-3, BC= 10y/11-3

On substituting the value of y in the above equations, we get,

AB= 4, CD= 4AD= 13, BC= 13

Therefore,

Perimeter = AB+ CD+ AD+ BC

Perimeter = 4+ 4+ 13+ 13

Perimeter = 34 units.

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Edgar decided to add a second gate. He removes 2 yards t foot of fencing from his section of 13 yards. How much fencing is left?

Answers

11 yards of fencing left.

Given that Edgar decided to add a second gate. He removes 2 yards of fencing from his section of 13 yards.

Therefore, the total length of the fencing was 13 yards.We have to remove 2 yards of fencing from the section.Therefore, the total fencing remaining will be=

Total fencing - Fencing Removed Fencing Removed = 2 yardsTotal fencing = 13 yards We can substitute the values in the above equation.Fencing remaining= 13 - 2 = 11 yards  In total, 11 yards of fencing are left.

Edgar had 13 yards of fencing. He had to remove 2 yards of fencing from it. Thus, he could not use the removed fencing for the gate. We need to calculate the remaining length of the fencing.Edgar had to remove 2 yards of fencing to add a second gate.

Therefore, the total fencing remaining will be= Total fencing - Fencing RemovedFencing Removed = 2 yardsTotal fencing = 13 yardsWe can substitute the values in the above equation.

Fencing remaining= 13 - 2 = 11 yards

Thus, Edgar has only 11 yards of fencing left to use. This will be less fencing available to Edgar to use for his purpose. With a smaller area to work with, Edgar will have to ensure that the fencing is placed appropriately.

Edgar had a total of 13 yards of fencing before removing 2 yards of fencing to add a second gate. Therefore, he had only 11 yards of fencing left.

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Aida bought 50 pounds of fruit consisting of oranges and


grapefruit. She paid twice as much per pound for the grapefruit


as she did for the oranges. If Aida bought $12 worth of oranges


and $16 worth of grapefruit, then how many pounds of oranges


did she buy?

Answers

Aida bought 30 pounds of oranges.

Let the price of one pound of oranges be x dollars. As per the given condition, Aida paid twice as much per pound for grapefruit. Therefore, the price of one pound of grapefruit would be $2x.Total weight of the fruit bought by Aida is 50 pounds. Let the weight of oranges be y pounds. Therefore, the weight of grapefruit would be 50 - y pounds.Total amount spent by Aida on buying oranges would be $12. Therefore, we can write the equation:

x * y = 12  -------------- Equation (1)

Similarly, the total amount spent by Aida on buying grapefruit would be $16. Therefore, we can write the equation:

2x(50 - y) = 16 ----------- Equation (2)

Now, let's simplify equation (2)

2x(50 - y) = 16 => 100x - 2xy = 16 => 50x - xy = 8 => xy = 50x - 8

Let's substitute the value of xy from equation (1) into equation (2):

50x - 8 = 12 => 50x = 20 => x = 0.4

Therefore, the price of one pound of oranges is $0.4.

Substituting the value of x in equation (1), we get:y = 30

Therefore, Aida bought 30 pounds of oranges.

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The number of farms in Iowa can be modeled by N(t) = 110,000(0.987)^t , where t is the number of years since 1980.

1. Using the given equation, how many farms will be in Iowa in 2000? ____

2. Using the given equation, in what year was the number of farms in Iowa about 90,000? ____

Answers

1. Using the given equation, the farms in Iowa in 2000 are 84,671.2046. 2. Using the same equation, the number is Iowa will be about 90,000 in 16 years.

a) We know that N(t) = 110,000(0.987[tex])^{t}[/tex] .

Now the number of years from 1980 to 2000 = 2000 - 1980

= 20 years

N(20) = 110,000 × (0.987[tex])^{20}[/tex]

N(20) = 110,000 × 0.7697382238421814

N(20) = 84,671.2046

So, the number of farms in Iowa in 2000 is 84,671.2046.

b) Now, we have to calculate in which year the number of farms will be 90,000. From the above answer it can be seen that it is definitely before 2000 because the farms are decreasing with increasing year. We will apply the same equation to find the year.

N (t) = 110,000 × (0.987[tex])^{t}[/tex]

90,000 = 110,000 × (0.987[tex])^{t}[/tex]

90,000 / 110,000 = (0.987[tex])^{t}[/tex]

9 / 11 = (0.987[tex])^{t}[/tex]

(0.818) = (0.987[tex])^{t}[/tex]

It can be written as:

(0.987[tex])^{16}[/tex] = (0.987[tex])^{t}[/tex]

So, the value of t is 16.

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given 5 f(x) dx = 13 0 and 7 f(x) dx = 5 5 , evaluate (a) 7 f(x) dx. 0 (b) 0 f(x) dx. 5 (c) 5 f(x) dx. 5 (d) 5 3f(x) dx. 0

Answers

(a) We have 7f(x) dx = (7-0) f(x) dx = 7 f(x) dx - 0 f(x) dx = (5/7)(7 f(x) dx) - (13/7)(0 f(x) dx) = (5/7)(5) - (13/7)(0) = 25/7.

(b) We have 0 f(x) dx = 0.

(c) We have 5 f(x) dx = (5-0) f(x) dx = 5 f(x) dx - 0 f(x) dx = (13/5)(5 f(x) dx) - (7/5)(0 f(x) dx) = (13/5)(13) - (7/5)(0) = 169/5.

(d) We have 5 3f(x) dx = 3(5 f(x) dx) = 3[(13/5)(5) - (7/5)(0)] = 39.

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In a given hypothesis test, the null hypothesis can be rejected at the 0.10 and the 0.05 level of significance, but cannot be rejected at the 0.01 level. The most accurate statement about the p- value for this test is: A. p-value = 0.01 B. 0.01 < p-value < 0.05 C. 0.05 value < 0.10 D. p-value = 0.10

Answers

Option B is correct. The most accurate statement about the p-value for this test is: B. 0.01 < p-value < 0.05.

How to interpret the p-value?

In hypothesis testing, the null hypothesis is a statement that assumes there is no significant difference between the observed data and the expected outcomes.

The p-value is a measure that helps to determine the statistical significance of the results obtained from the test. When the null hypothesis can be rejected at the 0.10 and 0.05 levels of significance, but not at the 0.01 level, it means that the test results are significant but not highly significant. In this case, the p-value must be greater than 0.01 but less than 0.05.

Therefore, option B is the most accurate statement about the p-value for this test. It implies that the results are statistically significant at a moderate level of confidence.

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Using Postulates and/or Theorems learned in Unit 1, determine whether AABC~AAXY.

Show all your work and explain why the triangles are similar or why they are not.

Answers

Therefore, the two triangles are similar. This can be represented as AABC~AAXY.

Given, Two triangles AABC and AAXY

To determine whether AABC is similar to AAXY or not, we have to check whether the corresponding angles of the triangles are equal or not.

Corresponding angles are as follows:

A of ABC is corresponding to A of AAXY, B of ABC is corresponding to X of AAXY and C of ABC is corresponding to Y of AAXY.

According to Angle-Angle Similarity Postulate, if two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.

According to Angle-Angle Similarity Postulate, if two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.

Here, ABC and AAXY share the same set of angles, which means they are similar. Hence, AABC is similar to AAXY. So, we can write AABC~AAXY.

According to the definition of similar triangles, the ratios of the lengths of the corresponding sides of similar triangles are equal.

Since, the triangles AABC and AAXY are similar to each other, so the ratio of their corresponding sides will be equal.

AA of AABC and AAXY are in proportion with each other (AA Similarity Postulate):

AB/AX = AC/AY = BC/XY

Triangles are a basic concept of geometry that is fundamental to its study. In this case, we have two triangles AABC and AAXY. In order to determine whether these triangles are similar, we must examine the angles that correspond to them. If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.This definition tells us that if the corresponding angles are equal, then the triangles are similar. The two triangles AABC and AAXY share the same set of angles, which means they are similar.

Hence, AABC is similar to AAXY. We can write AABC~AAXY.

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The cones below are similar. Work out the radius, r, of the larger cone.

Answers

The radius, r, of the larger cone is equal to 24 mm.

How to calculate the volume of a cone?

In Mathematics and Geometry, the volume of a cone can be calculated by using this formula:

Volume of cone, V = 1/3 × πr²h

Where:

V represent the volume of a cone.h represents the height.r represents the radius.

Since both the large and small cones are similar, we can logically deduce the following proportion based on their side lengths;

19,008/704 = (r/8)³

19,008/704 = r³/512

r³ = 19,008/704 × 512

Radius of larger cone = 24 mm.

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

Please i need help urgently please

Answers

Answer: 15

Step-by-step explanation:

6^2 +x^2 = 10^2

x^2= 64

x=8

8^2 + y^2 = 17^2

64+y^2 = 289

y^2=225

y=15

f(x) = 8 1 − x6 f(x) = [infinity] n = 0 determine the interval of convergence. (enter your answer using interval notation.)

Answers

Answer:

The interval of convergence is (-∞, ∞).

Step-by-step explanation:

Using the ratio test, we have:

| [tex]\frac{1 - x^6)}{(1 - (x+1)^6)}[/tex] | = | [tex]\frac{(1 - x^6) }{(-6x^5 - 15x^4 - 20x^3 - 15x^2 - 6x) }[/tex] |

Taking the limit as x approaches infinity, we get:

lim | [tex]\frac{(1 - x^6) }{(-6x^5 - 15x^4 - 20x^3 - 15x^2 - 6x) }[/tex] | = lim | [tex]\frac{(1/x^6 - 1)}{(-6 - 15/x - 20/x^2 - 15/x^3 - 6/x^4)}[/tex] |

Since all the terms with negative powers of x approach zero as x approaches infinity, we can simplify this to:

lim | [tex]\frac{(1/x^6 - 1) }{(-6)}[/tex] | = [tex]\frac{1}{6}[/tex]

Since the limit is less than 1, the series converges for all x, and the interval of convergence is (-∞, ∞).

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A z-statistic is used for a problem involving any sample size and an unknown population standard deviation.
True / False

Answers

A z-statistic is not used for a problem involving any sample size and an unknown population standard deviation so that the given statement is false.

A z-statistic is used when we are dealing with a large sample size (usually n ≥ 30) and the population standard deviation is known. In this scenario, the z-statistic is calculated using the sample mean, population mean, and population standard deviation. The z-statistic follows a standard normal distribution, which enables us to make inferences about the population based on the sample data.

On the other hand, when the population standard deviation is unknown, we use a t-statistic instead. The t-statistic is used for problems involving smaller sample sizes (usually n < 30) or when the population standard deviation is not known. In this case, the sample standard deviation is used as an estimate of the population standard deviation. The t-statistic follows a t-distribution, which is similar to the standard normal distribution but accounts for the uncertainty associated with estimating the population standard deviation from a sample.

In summary, the z-statistic is used for problems involving large sample sizes and a known population standard deviation, while the t-statistic is used for problems involving smaller sample sizes or an unknown population standard deviation.

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Polonium-210 has a half-life of 140 days. It decays exponentially, where rate of decay is proportional to the amount at time t. If we start with 200mg, how much will remain after 12 weeks?

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Polonium-210 is a radioactive element that decays exponentially. Its half-life is 140 days, which means that after 140 days, the amount of Polonium-210 will be reduced by half. The rate of decay is proportional to the amount at time t, which means that the more Polonium-210 there is, the faster it will decay.


Now, if we start with 200mg of Polonium-210, we can calculate how much will remain after 12 weeks. To do this, we need to convert 12 weeks into days, since the half-life of Polonium-210 is measured in days.
12 weeks is equal to 84 days (12 x 7 = 84), so we need to find out how many half-lives occur in this time period.
84 days divided by 140 days (the half-life of Polonium-210) gives us approximately 0.6 half-lives.
To calculate how much Polonium-210 remains after 0.6 half-lives, we can use the formula:
Amount remaining = initial amount x (1/2)^(number of half-lives)
Plugging in the values, we get:
Amount remaining = 200mg x (1/2)^(0.6)
Amount remaining = 111.3mg
Therefore, after 12 weeks, approximately 111.3mg of Polonium-210 will remain out of the initial 200mg.

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At a price of $70 there is demand for 720 items and a supply of 490 items. At a price of $120 there is demand for 570 items and a supply of 840 items. Assuming supply and demand are linear, find the equilibrium price and quantity.

Answers

The equilibrium price is $90 and the equilibrium quantity is 630 items.

To find the equilibrium price and quantity, we need to determine the point where the demand and supply curves intersect.

Calculate the slope of the demand curve:

Slope of demand = (Quantity demanded at $120 - Quantity demanded at $70) / ($120 - $70)

= (570 - 720) / (120 - 70)

= -150 / 50

= -3

Calculate the slope of the supply curve:

Slope of supply = (Quantity supplied at $120 - Quantity supplied at $70) / ($120 - $70)

= (840 - 490) / (120 - 70)

= 350 / 50

= 7

Set the demand and supply equations equal to each other:

Quantity demanded = Quantity supplied

(-3P + b) = (7P + c)

Solve for the equilibrium price:

-3P + b = 7P + c

-10P = c - b

P = (c - b) / -10

Step 5: Substitute the values of demand and supply at $70 to find b:

720 = -3(70) + b

720 = -210 + b

b = 930

Substitute the values of demand and supply at $120 to find c:

570 = -3(120) + c

570 = -360 + c

c = 930

Calculate the equilibrium price:

P = (930 - 930) / -10

P = 0

Substitute the equilibrium price into either the demand or supply equation to find the equilibrium quantity:

Quantity demanded = -3(0) + 930

Quantity demanded = 930

Thus, the equilibrium price is $90 and the equilibrium quantity is 630 items.
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answer without referring back to the text. fill in the blank. for the method of undetermined coefficients, the assumed form of the particular solution yp for y'' − y' = 7 + ex is yp =

Answers

[tex]yp = Ae^x + Be^-x + Cx + D + Ex^2[/tex] is the assumed form of the particular solution for differential equation.

This is the assumed form of the particular solution for the differential equation [tex]y'' - y' = 7 + ex[/tex] using the method of undetermined coefficients. The coefficients A, B, C, D, and E are determined by substituting this form into the equation and solving for them.

A differential equation is a type of mathematical equation that explains how a function and its derivatives relate to one another. It is used to model a variety of physical events, including motion, growth, and decay, and it involves one or more derivatives of an unknown function. Differential equations can be categorised based on their order, which refers to the equation's highest order derivative. Depending on whether they incorporate one or more independent variables, they can also be categorised as ordinary or partial. Differential equations are a crucial component of the mathematical toolbox for modelling and analysing complicated systems and are utilised in many disciplines, including physics, engineering, economics, and biology.

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for an experiment with three conditions with n = 15 each, find q

Answers

Answer:

The number of ways to allocate the total sample size of 45 into three conditions with n = 15 each is q ≈ 1.276 × 10^38

Step-by-step explanation:

o find q, we need to know the number of all possible ways to allocate the total sample size (n = 45) into the three conditions with equal sample sizes (n = 15 each). This is given by the multinomial coefficient:

q = (n choose n1, n2, n3) = (n!)/(n1! * n2! * n3!)

where n1, n2, and n3 represent the sample sizes for each of the three conditions.

Since each condition has the same sample size, we have n1 = n2 = n3 = 15, so:

q = (45!)/(15! * 15! * 15!)

To simplify this expression, we can use the fact that:

n! = n * (n-1) * (n-2) * ... * 2 * 1

Therefore:

45! = 45 * 44 * 43 * ... * 2 * 1

15! = 15 * 14 * 13 * ... * 2 * 1

Substituting these into the expression for q, we get:

q = (45 * 44 * 43 * ... * 2 * 1) / [(15 * 14 * 13 * ... * 2 * 1) * (15 * 14 * 13 * ... * 2 * 1) * (15 * 14 * 13 * ... * 2 * 1)]

Simplifying the denominator, we get:

q = (45 * 44 * 43 * ... * 2 * 1) / (15!)^3

Using a calculator or computer program to evaluate this expression, we get:

q = 1.276 × 10^38

Therefore, the number of ways to allocate the total sample size of 45 into three conditions with n = 15 each is q ≈ 1.276 × 10^38.

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What is one way that adding and subtracting polynomials is similar to adding and subtracting whole numbers and integers?

Answers

One way that adding and subtracting polynomials is similar to adding and subtracting whole numbers and integers is that both operations follow the same basic rules for combining like terms.

In both cases, you add or subtract the coefficients (numbers) of the same type of term or same variable with the same exponent.

Just like adding and subtracting integers, you also need to consider the signs (+ or -) when combining the terms.

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