X2 = 16 what is the anwser?

To construct a confidence interval for the proportion of defectives, we should use the plus four method.

Since the sample size is 20, which is not very large, the large-sample interval is not appropriate. Instep, we ought to utilize a strategy that's suitable for little test sizes. 

The plus four method is one such method that is commonly used when the sample size is small. Therefore, to construct a confidence interval for the proportion of defectives, we should use the plus four method.

The plus four strategies may be a strategy for building a certainty interim for an extent when the test estimate is little.

To utilize this strategy, we to begin with include four fanciful perceptions to our test, two of which are flawed and two of which are not imperfect.

This increments the test estimate to 24, which permits us to utilize the typical guess to the binomial dispersion to build the certainty interim.

The equation for the certainty interim utilizing the also four strategies is:

p ± zα/2 √((p + 2) (1 - p + 2) / n + 4)

where:

p is the test extent (number of defectives/test estimate)

zα/2 is the basic esteem from the standard typical dissemination at the level of importance α/2

n is the test estimate (counting the included four nonexistent perceptions)

Therefore, to construct a confidence interval for the proportion of defectives, we should use the plus four method.

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I hope this helps you .

Answer: Part A is (-9, 13) Part B is (9, 13)

Step-by-step explanation:

If the total trip takes 12 hours, the speed of the current is 1 mph.

The speed of an object is described as  the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time.

The downstream trip:

distance = rate × time

96 = (18 + x) × t ( 18 + x)

The upstream trip:

distance = rate × time

96 = (18 - x) × (12 - t)

96 = (18 - x) × (12 - t)

8 = x - (x/6)t

We have two equations and two unknowns, so we can solve for x and t.

We solve for x by making t subject fomula and substituting into the equation.

Where x = 1

In conclusion, if the total trip takes 12 hours, the speed of the current is 1 mph.

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Part A

According to the equation, the values of a is a = 2009 + f(a) and b is b = 800 + f(b).

Part B

Approximately it takes 8 years from 2009 for the population of wild tigers in Nepal to reach 800.

To find these values, we need to set the equation for the population of wild tigers equal to 800 and solve for x. The equation becomes 800 = 121(2)ˣ.

Taking the logarithm of both sides, we get

=> log(800) = log(121) + x log(2).

Solving for x, we get

=> x = (log(800) - log(121))/log(2).

Moving on to the second part of the problem, we are asked to determine approximately how many years from 2009 it will take for the population of wild tigers in Nepal to reach 800. Using the equation we derived in Part A, we can plug in values of a and use trial and error to find the answer. However, this can be time-consuming.

Instead, we can use a calculator to get an approximate answer. Plugging in the values for log(800) and log(121) into the equation we derived in Part A, we get x = 7.75.

Therefore, it will take approximately 8 years from 2009 for the population of wild tigers in Nepal to reach 800.

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The probability that a randomly selected student from this class has four or more pets at home is 4/31 ≈ 0.13 when rounded to the nearest two decimal places.

Explain probability

Probability is a measure of the likelihood or chance of an event occurring. It is a numerical value between 0 and 1, with 0 indicating no chance and 1 indicating certainty. Probability is calculated by dividing the number of desired outcomes by the total number of possible outcomes. It is used in many fields, including mathematics, statistics, science, and engineering.

According to the given information

Based on the data provided, there are a total of 4 students who have four or more pets at home

(0 with 4 pets + 1 with 5 pets + 2 with 6 pets + 1 with 7 pets).

Since there are a total of 31 students in the class, the probability that a randomly selected student from this class has four or more pets at home is 4/31 ≈ 0.13 when rounded to the nearest two decimal places.

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Based on the equation 441 + b² = 3011.81, the value of b is equal to 50.7032.

In Mathematics, an exponent is a mathematical operation that is typically used in conjunction with an algebraic expression in order to raise a quantity to the power of another.

This ultimately implies that, an exponent is represented by the following mathematical expression;

bⁿ

Where:

Based on the given equation, we have the following;

441 + b² = 3011.81

By subtracting 441 from both sides of the equation, we have the following:

441 + b² - 441 = 3011.81 - 441

b² = 3011.81 - 441

b² = 2570.81

b = √2570.81

b = 50.7032.

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Answer: 7/9

Step-by-step explanation: 3 + 4 = 9

add the /9 = 7/9

The volume of the cheese head is 192 cubic inches.

Explain the term volume

Volume refers to the amount of space that an object or substance occupies in three dimensions. It is typically measured in units such as cubic meters or cubic feet. The volume of an object can be calculated using various formulas, depending on its shape and dimensions.

According to the given information

The volume V of a triangular prism is given by the formula:

V = (1/2) * b * h * L

In this case, the base of the triangle is 12 inches, the height of the triangle is 8 inches, and the length of the prism (depth of the 3D shape) is 4 inches. Substituting these values into the formula, we get:

V = (1/2) * 12 * 8 * 4

V = 192 cubic inches

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The equation of this circle in general form is: (x - 1)^2 + (y - 3)^2 = 36

To find the equation of a circle in general form, we need to complete the square for both x and y terms.

x^2 + y^2 - 2x - 6y - 26 = 0

First, we will complete the square for x terms:

x^2 - 2x + y^2 - 6y - 26 = 0

(x - 1)^2 - 1 + y^2 - 6y - 26 = 0

(x - 1)^2 + y^2 = 27

Now, we will complete the square for y terms:

(x - 1)^2 + (y - 3)^2 = 36

Therefore, the equation of this circle in general form is: (x - 1)^2 + (y - 3)^2 = 36

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Answer:

x2+y2−2x−6y−26=0

Step-by-step explanation:

Just took the test.

For a hypothesis testing by considering two samples related to rate of people who exercise and who do not exercise, the observed t-value < standard so, null hypothesis does not rejected and there is no evidence to support the claim.

We have a researcher who was interested in making a comparison of resting pulse rate of people who exercise regularly and who do not exercise regularly. There is two independent samples. In 1ˢᵗ sample, sample size, n₁= 16

Sample mean, [tex]\bar X_1[/tex] = 72.3

Standard deviations, s₁ = 10.3

In case of second sample, sample size, n₂ = 12

Sample mean, [tex] \bar X_2[/tex] = 69.0

Standard deviations, s₂ = 8.9

Level of significance = 2.5% = 0.25

Consider the null and alternative hypothesis for the test hypothesis are defined as [tex]H_0 : μ_1 =μ_2[/tex]

[tex]H_a : μ_1 >μ_2[/tex]

The test statistic : using t-test formula

[tex]t = \frac{ \bar X_1 - \bar X_2}{\sqrt{\frac{s_1^2}{n_1} +\frac{s_2^2}{n_2}}}[/tex]

[tex]= \frac{72.3- 69}{ \sqrt{ \frac {10.3^2}{16} + \frac{8.9^2}{12}}}[/tex]

= 0.91

Degree of freedom, df = n1 + n2 - 2

= 16 + 12 -2 = 26

Using the t-distribution table, the critical value for t(0.025, df = 26) is equals to the 2.06. Now, the observed t-value = 0.91 is less than 2.06 ( standard t value), so, we do not reject H₀ . Hence, no evidence to support the researcher claim.

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If in an Bernoulli experiment the chance of picking red ball is 3.2 times higher than to pick a blue ball, the probability of picking a red ball is approximately 0.7619, or 76.19%.

A Bernoulli experiment is a statistical experiment that has only two possible outcomes, usually referred to as success and failure. In this case, the outcomes are picking a red ball or picking a blue ball.

Let's assume that the probability of picking a blue ball is P(B), and the probability of picking a red ball is P(R). We are given that the chance of picking a red ball is 3.2 times higher than the chance of picking a blue ball. Mathematically, this can be expressed as:

P(R) = 3.2 * P(B)

We also know that the sum of the probabilities of all possible outcomes must be 1, so:

P(R) + P(B) = 1

We can use these two equations to solve for P(R):

P(R) + (1/3.2) * P(R) = 1

(4.2/3.2) * P(R) = 1

P(R) = 3.2/4.2 = 0.7619

This means that out of every 10 balls, about 7.6 will be red and 2.4 will be blue.

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Complete question is:

In an Bernoulli experiment the chance of picking red ball is 3.2 times higher than to pick a blue ball. What is the probability of picking the red ball?

The equation that represents the cost of the rental truck is y = 0.42x + 71. The Option C is correct.

Let x be the number of miles driven

Let y be the cost of the rental truck.

We can set up a system of equations to represent the given information:

For Bob:

y = mx + b

112.96 = 138m + b

For Carl:

y = mx + b

142.78 = 209m + b

Solving for b in both equations, we get:

b = 112.96 - 138m

b = 142.78 - 209m

Setting the two expressions for b equal to each other, we get:

112.96 - 138m = 142.78 - 209m

209m - 138m  = 142.78 - 112.96

71 m = 29.82

m = 0.42

Substituting m into equation for b:

b = 71.

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The null hypothesis represents the default assumption or the status quo, while the alternative hypothesis represents the alternative possibility or the hypothesis that is being tested.

These two hypotheses are mutually exclusive, meaning that if one is true, the other must be false.

The null and alternative hypotheses divide all possibilities into two non-overlapping sets.

In statistical hypothesis testing, the null and alternative hypotheses divide all possibilities into two non-overlapping sets.

These two hypotheses represent different explanations or theories about the data, and they are used to make inferences about the population from the sample data.

The null hypothesis represents the default assumption or the status quo. It states that there is no significant difference or relationship between two variables, or that the observed data is due to random chance alone. The alternative hypothesis, on the other hand, represents an alternative explanation or theory about the data.

It states that there is a significant difference or relationship between two variables, or that the observed data is not due to random chance alone.

The null and alternative hypotheses are mutually exclusive, meaning that if one hypothesis is true, the other hypothesis must be false.

They are also exhaustive, meaning that they cover all possible explanations for the observed data.

By dividing all possibilities into two non-overlapping sets, the null and alternative hypotheses allow us to make a decision about which hypothesis is more likely to be true based on the evidence provided by the sample data.

In order to test the null and alternative hypotheses, we use statistical methods to calculate the probability of obtaining the observed data if the null hypothesis were true.

This probability is called the p-value, and it represents the likelihood of obtaining the observed data or a more extreme result if there were no true effect or relationship in the population.

If the p-value is small enough, we reject the null hypothesis in favor of the alternative hypothesis.

The null and alternative hypotheses divide all possibilities into two non-overlapping sets and provide a framework for making inferences about the population based on sample data.

By testing the null hypothesis and calculating the p-value, we can make decisions about which hypothesis is more likely to be true based on the evidence provided by the sample data.

In statistical hypothesis testing, we use evidence from the data to decide whether to reject the null hypothesis in favor of the alternative hypothesis or not.

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Answer: 71

Step-by-step explanation: to get the answer you have to know that all the angles of a triangle have to add up to 180 so therefore you add the angles they gave you and then you minus them from 180 and you get 71

The surface area of the triangular prism is 312 ft².

In order to calculate the surface area of a prism, we  twice the perimeter of base of the prism to twice the area of the base of the prism

To calculate the surface area of the triangular prism in the question, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the surface area is 312 ft².

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At 4:00 PM, the distance between Andy and Bill is minimal, about 6.04 miles apart.

Pythagorean theorem is used to find the distance between Andy and Bill at any point in time.

Suppose 3 t hours have passed.

12:00 am.

At that point, Andy moved a remove of 4 miles south from point A, and Charge moved a remove of 5 miles west of point B.

The separation between Andy and Charge is given by

[tex]D(t) = sqrt[(9 - 5t)^2 + (4t)^2][/tex]

To find the time when the distance between Andy and Bill is minimal, we need to find the value of t that minimizes D(t).

To do this, find the derivative of D(t) with respect to t, set it to zero, and solve for t.

dD/dt = (1/2)[2(9 - 5t)(-5) + 2(4t)*(4)]

= -45 + 16t

Setting dD/dt = 0 gives: -45 + 16t = 0

Solving for t gives: t = 45/16 ≈ 2.81 hours

Therefore, the time at which the distance between Andy and Bill is minimal is 3.

48 hours (rounded to the nearest minute).

Note that at this point Andy has traveled a remove of 42.81 = 11.24 miles south of point A, and Charge has traveled a remove of 52.81 = 14.05 miles west of point B.

The separations between them are:

[tex]D(2.81) = sqrt[(9 - 52.81)^2 + (42.81)^2] ≈ 6.04 miles[/tex]

therefore, At 4:00 PM, the distance between Andy and Bill is minimal, about 6.04 miles apart.

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Answer:

  see attached

Step-by-step explanation:

You want a clock face with an angle of 240° between the hour and minute hands.

There are 22 possible locations for the minute hand such that the long arc between the hour and minute hands is 240°. The two of these that do not involve fractions of a second are 4:00 and 8:00.

The next occurrence will be 21 minutes 49 1/11 seconds later. And the one after that will be 43 minutes 38 2/11 seconds later, or 1 hour 5 minutes and 27 3/11 seconds after the first occurrence of the pair.

A clock face illustrating 8:00 is attached. You may need to scale it to your desired radius.

You can set your compass to 2" and draw the clock face circle. The points for 12 and 8 can be located by using the 10:00 position as the center of arcs with the same radius. Where those arcs intersect the original circle are the locations of 12 and 8.

(a) The simplified and correct expression is (6×7)-(5 +4) = 16

(b) The simplified and correct expression is (-2x²) + (24÷12)-4 = 2

a. 6×7-5 +4= 16

In this calculation, we need to use brackets to ensure the correct order of operations, which is typically remembered using the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division [from left to right], Addition and Subtraction [from left to right]).

Without brackets, the calculation would be evaluated as follows:

6×7-5 +4 = 42-5 +4 (applying multiplication first)

= 37 +4 (applying subtraction)

= 41 (applying addition)

However, the desired result is 16. To achieve this, we can use brackets to group the addition and subtraction operations together, like this:

(6×7)-(5 +4) = 42 - 9 (applying addition within the brackets first)

= 33 (applying subtraction)

b. -2x²+24÷12-4=2

Similarly, in this calculation, we need to use brackets to ensure the correct order of operations.

Without brackets, the calculation would be evaluated as follows:

-2x²+24÷12-4 = -2x²+2-4 (applying division first)

= -2x²-2 (applying addition and subtraction)

However, the desired result is 2. To achieve this, we can use brackets to group the division and subtraction operations together, like this:

-2x²+(24÷12)-4 = -2x²+2-4 (applying division within the brackets first)

= -2x²-2 (applying addition and subtraction)

By adding brackets to each calculation to ensure the desired order of operations, we arrive at the correct results of 16 and 2, respectively.

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Answer:

Step-by-step explanation:

Social media usage is one of the most popular online activities and in 2021, 82 percent of the population in the United States had a social networking profile, representing a two percent increase from the 80 percent usage reach in the previous year.

Social media usage is one of the most popular online activities, and in 2021, 82 percent of the population in the United States had a social networking profile, marking a two percent rise over the previous year's usage reach of 80 percent.

Brainlist?

Answer: The 8 oz steak is a better buy as it has a lower unit price at $1.06 per ounce compared to $1.14 per ounce for the 14 oz steak.

Step-by-step explanation: To determine which is a better buy, we can calculate the unit price of each steak.

The unit price is the price per ounce of steak.

For the 8 oz steak:

Unit price = price ÷ quantity = $8.50 ÷ 8 = $1.06 per ounce

For the 14 oz steak:

Unit price = price ÷ quantity = $16.00 ÷ 14 = $1.14 per ounce

Therefore, the 8 oz steak is a better buy as it has a lower unit price at $1.06 per ounce compared to $1.14 per ounce for the 14 oz steak.

Results from the Simple Interest:

1. The amount Tucker will receive in interest after 5 years = $1,165.50.

2 The simple interest rate Wilson would need to make his $9,000 grow to $85,000 in 16 years =  53%.

3. The number of years it will take for $7,000 to double in an account with 2.8% simple interest = ≈36 years.

4. The ending balance after 6 years = $25,472.

Using Simple interest formula: S.I. = P × R × T

Simple interest (SI) formular = Interest (I) = Principal (P) * Rate (R) * Time(T)

Given:

P= $7,400

R = 3.15% or 0.0315

T = 5 years

Plugging in the values:

Interest = ($7,400 * 0.0315 * 5)

Interest = $1,165.50

2) Using SI  formular: I = P* R * T

Given:

P = $9,000

I = $85,000 - $9,000 = $76,000 (as the total cost is the principal plus interest)

T = 16 years

Plugging in the values:

$76,000 = $9,000 * Rate * 16

R = $76,000 / ($9,000 * 16)

To convert  to percentage, we multiply by 100:

Rate = 0.531 * 100

Rate = 53.1%.

3) Using SI  formular: I = P* R * T

Given:

P = $7,000

R = 2.8%

I = P

T = ?

Plugging in the values and solving for Time (T):

$7,000 = $7,000 * 0.028 * T

T = $7,000 / ($7,000 * 0.028) = 35.7

T  ≈36 years

4. Using SI  formular: I = P* R * T

Given:

P = $20,000

R = 4.56%

T = 6 years

Plugging in the values:

P = $20,000

R = 4.56% or 0.0456

T = 6 years

Ending Balance (EB) = P + (Pl *  R * T)

EB = $20,000 + ($20,000 * 0.0456 * 6)

EB = $20,000 + $5,472

EB = $25,472

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The value of k given the absolute value functions is (a) k = -5

Given that

graph = f(x)

table = g(x)

Since the vertex of the function f(x) is at (0,1), we have f(0) = 1.

Also, from the given table, we have g(0) = -4.

Therefore, if g(x) = f(x) + k, we must have g(0) = f(0) + k = 1 + k.

But we also know that g(0) = -4. Thus, we have:

1 + k = -4

Solving for k, we get:

k = -5

Therefore, the value of k is -5.

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Answer:

32

Step-by-step explanation:

512 / 4 = 128

128 / 4 = 32

32 / 4 = 8

8 / 4 = 2

The value of the functions are;

f(-4) = 1/16

f(-3) = 1/8

f(-2) = 1/4

f(-1) = 1/2

f(0) = 1

It is important to note that functions are described as equations or expressions that shows the relationship between two variables.

From the information given, we have that;

The function, f(x) = 2ˣ

To determine the value of f(x) for -4, we have to substitute the value

f(x) = 2⁻⁴

find the value

f(-4) = 1/2⁴ = 1/16

For the value of f(-3)

f(-3) =2⁻³

find the value

f(-3) = 1/2³ = 1/8

For the value of -2

f(-2) = 2⁻²

f(-2) = 1/2² = 1/4

For the value of -1

f(-1) = 2⁻¹

f(-1) = 1/2¹ = 1/2

For the value of 0

f(0) = 2⁰

f(0) = 1

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The GDP of the hypothetical country in this case is R363 billion.

To calculate GDP, we use the following formula:

GDP = C + G + I + NX

where:

C = consumer spending

G = government spending

I = business investment

NX = net exports (exports - imports)

Now, let's plug in the given values into the formula and calculate the GDP:

GDP = R220 billion (C) + R50 billion (G) + R100 billion (I) + (R25 billion - R32 billion) (NX)

GDP = R220 billion + R50 billion + R100 billion - R7 billion

GDP = R363 billion

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The image vertices of N'M'O' after reflecting triangle NMO over x = -2 are N'(1, 2), M'(-2, 1), and O'(-1, 3).

What is meant by vertices?

Vertices (singular: vertex) are the points where two or more edges meet in a geometric shape or object. They are also known as corners and are a defining feature of many shapes, including polygons, polyhedra, and graphs.

What is meant by a triangle?

A triangle is a geometric shape with three sides and three angles. It is a fundamental shape in geometry and has many practical applications in mathematics, science, and engineering.

According to the given information

In this case, the line of reflection is x = -2. The distance from N's x-coordinate to the line of reflection is |-5 - (-2)| = 3. So the x-coordinate of N' is -2 + 3 = 1. The y-coordinate of N' remains the same as N's y-coordinate, so N' = (1, 2).

The distance from M's x-coordinate to the line of reflection is |-2 - (-2)| = 0. So the x-coordinate of M' is -2 + 0 = -2. The y-coordinate of M' remains the same as M's y-coordinate, so M' = (-2, 1).

The distance from O's x-coordinate to the line of reflection is |-3 - (-2)| = 1. So the x-coordinate of O' is -2 + 1 = -1. The y-coordinate of O' remains the same as O's y-coordinate, so O' = (-1, 3).

So the image vertices of N'M'O' after reflecting triangle NMO over x = -2 are N'(1, 2), M'(-2, 1), and O'(-1, 3).

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Answer:

6/6=1

Step-by-step explanation:

Answer:

x=2

Step-by-step explanation:

This is a system of equations that we can solve by using substitution.

We know that y=7. We know that y is also equal to 8x-9.

Since y is equal to both 7 and 8x-9, this must mean that 7 is also equal to 8x-9.

Let's set them equal and solve for x, like so:

[tex]y=8x-9=\\7=8x-9=\\16=8x=\\2=x[/tex]

So, x=2.

Answer:

The words "per" and "each" are associated with quantity and division. They are used to express the ratio or rate of one thing in relation to another. For example, "The cost is $10 per pound" or "Each student receives one book."

Answer:

The words per and each are associated with Division.

Step-by-step explanation:

Think of the words "percent". We can divide the word into two easier terms, "per" and "cent". Per means for each. Dividing also means for each.

I'm trying my best without an answer key to help me see what you want to be answered, let me know if there is something specific you would like to know. :)

-a friendly 8th grader :D