Answer is D.
Can anyone explain why??

Answer Is D.Can Anyone Explain Why??

Answers

Answer 1

The true statement regarding the hypothesis will be:

II. A 95 percent confidence interval for the difference in means will contain the value 0.III. A 99 percent confidence interval for the difference in means will contain the value 0.

The correct option is D II and III only.

How to explain the hypothesis

A two-sample t-test of the hypotheses Hoμ1-2 = 0 versus H 41-μ2> 0 produces a p-value of 0.03.

In this case, a 95 percent confidence interval for the difference in means will contain the value 0.

Also, a 99 percent confidence interval for the difference in means will contain the value 0.

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Related Questions

What happens if the red lines are NOT parallel. Which angle types are still congruent? (Please help...thanks)

Answers

Answer:

When the red lines in a geometric figure are not parallel, the congruency of angles may vary. Vertical angles formed by the intersection of non-parallel lines are always congruent, while corresponding angles and alternate interior angles may or may not be congruent. The congruency of angles depends on the specific relationship between the angles and the lines in the figure, and further analysis of the figure would be necessary to determine which angles are congruent.

Suppose that Leni and Thom are lawyers and each has a taxable income of $230,000. They can't decide if they should be married in December or in January. If they marry in December, then they are considered married for the entire tax year and could file a joint return. If they get married in January of the next year, they would file a separate return each as a single taxpayer. Examine Schedules X and Y-1. Which filing status would yield the lower tax? If so, by how much? is there really a marriage penalty?

Answers

Filing separate returns as single taxpayers would yield a lower tax liability for Leni and Thom, by an amount of $134,722.50 - $42,698.50 = $92,024.50.

What is tax liability?

Tax liability is the sum that a person or business owes the government in taxes. Although it frequently consists of sales tax and capital gains tax, it is typically calculated as a percentage of one's income.

To determine which filing status would yield the lower tax for Leni and Thom, we need to compare the tax liability for each filing status. We will use the 2021 tax brackets and tax rates provided in Schedules X and Y-1.

Assuming that Leni and Thom have no dependents, the taxable income for each of them is $230,000.

If they file a joint return for the entire year (i.e., they get married in December), their taxable income would be $460,000, which falls in the 35% tax bracket. Using the tax table in Schedule X, their tax liability would be:

$24,800 + 35% of the amount over $171,050 = $24,800 + 35% x ($460,000 - $171,050) = $24,800 + $109,922.50 = $134,722.50

If they file separate returns as single taxpayers for the entire year (i.e., they get married in January), each of their taxable incomes would be $230,000, which also falls in the 35% tax bracket. Using the tax table in Schedule Y-1, their tax liability would be:

$14,125 + 35% of the amount over $209,425 = $14,125 + 35% x ($230,000 - $209,425) = $14,125 + $7,224.25 = $21,349.25

Therefore, filing separate returns as single taxpayers would yield a lower tax liability for Leni and Thom, by an amount of $134,722.50 - $42,698.50 = $92,024.50. This is known as the "marriage penalty," where couples with similar incomes who file jointly pay more in taxes than they would if they were single and filing separately.

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Ms. Roberts selected 4 3/4 pounds of grapes. The grapes cost $2.50 per pound. How much will Ms. Roberts pay for the grapes?

Answers

Ms. Roberts will pay $9.375 for the grapes.

We have,

To calculate the cost of the grapes, you can multiply the weight of the grapes by their price per pound.

Weight of grapes = 4 3/4 pounds

Price per pound = $2.50

Total cost of grapes = (4 3/4 pounds) x ($2.50/pound)

First, we need to convert the mixed number 4 3/4 to an improper fraction:

= 4(3/4)

= (4 x 4 + 3)/4

= 19/4

Now, we can multiply:

Total cost of grapes = (19/4) x ($2.50/pound)

Simplifying the fractions:

Total cost of grapes = $9.375

Therefore,

Ms. Roberts will pay $9.375 for the grapes.

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Cuanto es 14 pulgadas en cual es el area aproximada en pulgadas cuadradas

Answers

If 14 inches represents the length of a square, then the approximate area of that square would be 196 square inches.

If the 14 inches represents the length of a square, we can calculate the area of the square by multiplying its length by its width. However, since a square has four sides of equal length, we know that its width is also 14 inches. Therefore, the area of the square can be calculated as:

Area = length x width = 14 inches x 14 inches = 196 square inches.

In general, the formula for the area of a rectangle is length x width, while the formula for the area of a circle is πr^2, where r is the radius of the circle.

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Complete question is:

If the 14 inches represents the length of a square. what is the approximate area in square inches.

Find the midpoint of A and B where A has coordinates (-3, -5) and B has coordinates (4, 4).​

Answers

Answer:

(0.5, -0.5)

Step-by-step explanation:

To find the midpoint of A and B, we can use the midpoint formula. The formula involves finding the average of the x-coordinates and the average of the y-coordinates.

Midpoint formula: ((x1 + x2) / 2 , (y1 + y2) / 2)

Using the coordinates of A (-3, -5) and B (4, 4), we can plug them into the formula:

(((-3) + 4) / 2 , ((-5) + 4) / 2)

Simplifying this gives us the midpoint of A and B: (0.5, -0.5).

Therefore, the midpoint of A and B is at coordinates (0.5, -0.5).

For the month of January, the amount of
snowfall was 3 inches above average.

Answers

Required polynomial is (x+3) where x is amount of average snowfall.

Here given in January, the amount of snowfall was 3 inches above average.

1. The average snowfall for January was a certain amount (let's call this 'A' inches).

2. The actual snowfall for January was 3 inches more than the average.

3. To calculate the actual snowfall for January, we can use the equation: Actual Snowfall = Average Snowfall (A) + 3 inches.

So, if we knew the average snowfall (A), we could easily find the actual snowfall by adding 3 inches to it.

Let amount of average snowfall be x inches.

So, snowfall in January month = (x+3) inches .

Therefore, required polynomial is (x+3) where x is amount of average snowfall.

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Correct answer is " Find a polynomial of the statement For the month of January, the amount of snowfall was 3 inches above average"

Question 1: A gardener uses a total of 81.5 gallons of gasoline in one month. Of the total amount of
gasoline, 2/5 was used in his lawn mowers. How many gallons of gasoline did the gardener use in his
lawn mowers in the one month?
A. 12.3 gal
B. 203.75 gal
C. 0.326 gal
D. 32.6 gal

Answers

Answer: D

Step-by-step explanation:

The amount of gasoline used in the lawn mowers is 2/5 of the total amount of gasoline used. Therefore:

Gasoline used in lawn mowers = (2/5) x 81.5 gallons

Gasoline used in lawn mowers = 32.6 gallons

Therefore, the answer is D. 32.6 gal.

what is equivelent to −2y−8+4y khan academy

Answers

The equivalent expression is 2(y-4).

What is an expression?

A statement with more than two variables or integers can be written as an expression using addition, subtraction, multiplication, and division operations.

What is equivalent?

Even though they have different looks, expressions that are equivalent do the same action. Two algebraic expressions that are equivalent have the same value when the variable is entered with the same value.

We have,

-2y - 8 + 4y

-2y and 4y are like terms.

So,

Add the like terms.

2y - 8

Taking out 2 commons.

2(y - 4)

Now,

We can not further simplify the expression.

Thus,

The equivalent expression is 2(y - 4).

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solve tan^2x = (power reducing formula)

Answers

The solutions to the equation [tex]tan^2(x) = (sec^2(x) - 1)[/tex]are:

x = 2nπ or x = (2n+1) π/2, where n is an integer.

The power reducing formula for the tangent function is:

[tex]tan^2(x) = (sec^2(x) - 1)[/tex]

Therefore, we can rewrite the equation as:

[tex](sec^2(x) - 1) = 0[/tex]

Simplifying further, we get:

[tex]sec^2(x) = 1[/tex]

Taking the square root of both sides, we get:

sec(x) = ±1

Recall that secant is the reciprocal of cosine, so we can write:

cos(x) = ±1

The cosine function can only take values between -1 and 1, so the only possible solutions are:

cos(x) = 1, which implies x = 2nπ (where n is an integer)

or

cos(x) = -1, which implies x = (2n+1)π/2 (where n is an integer).

The power reducing formula is a trigonometric identity that allows you to express a trigonometric function of a higher power in terms of a trigonometric function of a lower power.

It is most commonly used for reducing the power of the sine and cosine functions.

The power reducing formula for cosine is:

[tex]cos^2(x) = (1 + cos(2x))/2[/tex]

The power reducing formula for sine is:

[tex]sin^2(x) = (1 - cos(2x))/2[/tex]

These formulas can be derived using the Pythagorean identity, which states that [tex]sin^2(x) + cos^2(x) = 1.[/tex]

By solving for either[tex]sin^2(x) or cos^2(x)[/tex] in terms of the other, and then using the double angle formula for cosine[tex](cos(2x) = cos^2(x) - sin^2(x)),[/tex] we can arrive at the power reducing formulas.

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the results of a survey show that 40$ of 300 students choose Recycling as the top priority or their generation? how many students choose recycling?

Answers

the answer is 120 students

The width of a rectangle is one quarter of the length of the rectangle. The perimeter of the rectangle
is 27 inches.

A. Find the width and the height of the rectangle. Show your work

B. Find the area of the rectangle. Show your work

Answers

A. The area of the rectangle is 29.16 square inches.

B. The width of the rectangle is 2.7 inches and the height (or length) is 10.8 inches

What is rectangle?

A parallelogram in which each pair of adjacent sides is perpendicular is referred to as a rectangle.

We should utilize "w" to address the width and "l" to address the length of the square shape.

A. Since the width equals one quarter of the length, we are able to write:

w = (1/4)l

We also know that the perimeter of the rectangle is 27 inches, and

the formula for the perimeter of a rectangle is:

P = 2l + 2w

Substituting the first equation into the second equation, we get:

P = 2l + 2(1/4)l

27 = 2.5l

l = 10.8

Now that we know the length, we can use the first equation to find the width:

w = (1/4)l

w = (1/4)(10.8)

w = 2.7

As a result, the rectangle has a width of 2.7 inches and a height of 10.8 inches.

B. To find the area of the rectangle, we can use the formula:

Area = length *width

Substituting the values we found above, we get:

A = (2.7)*(10.8)

A = 29.16

Therefore, the area of the rectangle is 29.16 square inches.

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the mean age at first marriage for respondents in a survey is 23.33, with a standard deviation of 6.13. calculate the z score associated with an observed age at first marriage of 25.50.

Answers

The z-score associated with an observed age at first marriage of 25.50 is 0.35.

To calculate the z-score associated with an observed age at first marriage of 25.50, we use the formula:

z = (x - μ) / σ

where:

x = the observed age at first marriage (25.50)

μ = the mean age at first marriage (23.33)

σ = the standard deviation of age at first marriage (6.13)

Substituting the given values, we get:

z = (25.50 - 23.33) / 6.13

z = 0.35

Therefore, the z-score associated with an observed age at first marriage of 25.50 is 0.35.

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Which line best describes the narrative structure of "Cautionary Tale of Girls and Birds of Prey"?

1) alliteration and assonance that create a peaceful, dreamlike rhythm
2)exaggeration and hyperbole used to describe a girl’s irrational fear of a bird of prey
3)images that make the reader question whether the girl only imagined the hawk
4)two-line stanzas that slowly build suspense about the girl’s fear of the hawk

Answers

The answer is Option 4) two-line stanzas that slowly build suspense about the girl’s fear of the hawk.

What is a metaphor?

In literature, metaphors are frequently used to evoke strong feelings and express nuanced concepts. Because they establish a clear connection between two objects, they can be more effective than similes, but they can also be trickier to understand because they depend on the reader's comprehension of the suggested meaning. On the other hand, similes are frequently used in everyday language and might have a clearer meaning.

The poem is divided into two-line stanzas, with each stanza offering a specific concept or illustration that helps to heighten the tension around the girl's hawk phobia. Up until the final stanza, where the story's climax is disclosed, each of the stanzas builds on the one before it, intensifying the situation and the girl's anxiety. The short, pointed lines that emphasise the bird's unexpected arrival and motions, as well as the poem's structure, all contribute to its tense, unsettling atmosphere.

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please i need your help for today please i would really appreciate it​

Answers

Answer:80

Step-by-step explanation:

100.0
How long would it take the bowling ball to fall 150 feet? (Estimate your answer to one
decimal place. Hint: Use the equation d = 16t².)

Answers

It would take the bowling ball approximately 3.1 seconds to fall 150 feet.

What is distance?

Distance is the total movement of an object, regardless of direction. We can define distance as how much ground an object has covered, regardless of its starting or ending point.

Distance is defined as the size or amount of displacement between two positions. Note that the distance between two locations is not the same as the distance between them. The distance traveled is the total length of the path traveled between two positions.

Here given equation,

d = 16t², where t is the time in seconds and d is the distance in feet and distance is 150 feet.

We want to find the value of t.

Now,

[tex]d = 16 {t}^{2} \\ {t}^{2} = \frac{d}{16} \\ {t}^{2} = \frac{150}{16} \\ t = \sqrt{( \frac{150}{16}) } \\ t = \sqrt{9.375} \\ t = 3.0619[/tex]

So, t = 3.1 (rounded to one decimal place)

Therefore, it would take the bowling ball approximately 3.1 seconds to fall 150 feet.

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Correct question is "How long would it take the bowling ball to fall 150 feet where equation of distance is d = 16t² ?(Estimate your answer to one decimal place). "

a survey of middle school students asked participants how they get to school each morning. the results of the survey are summarized. students walk to school students ride in a car to school students take the bus to school students ride their bikes to school what type of data set was created using this survey?\

Answers

The data set created from this survey is a categorical or nominal data set.

Categorical data is a type of data that can be divided into groups or categories based on specific characteristics or attributes. In this case, the groups are based on the mode of transportation used by the middle school students to get to school. The categories in this data set are "walk," "car," "bus," and "bike." Categorical data can be further classified as either nominal or ordinal.

Nominal data is a type of categorical data where the categories do not have any particular order or ranking, while ordinal data has a specific order or ranking. In this case, the categories "walk," "car," "bus," and "bike" do not have any specific order or ranking, so this data set is an example of nominal categorical data.

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A coin is flipped at the start of every game to determine if Team A (heads) or Team B (tails) will get the ball first.
Part A: Find the theoretical probability of a fair coin landing on heads.
Part B: Flip a coin 14 times and record the frequency of each outcome. Be sure to include the frequency of each outcome in your answer. Then, determine the experimental probability of landing on heads and compare it to the theoretical probability.

Answers

The theoretical probability of a fair coin landing on heads is 1/2 or 0.5. The experimental probability of landing on heads is also 0.5, which matches the theoretical probability.

What is probability?

Probability is a measure of the likelihood or chance of an event occurring. It is a number between 0 and 1, with 0 representing an impossible event and 1 representing a certain event. The probability of an event is calculated by dividing the number of ways the event can occur by the total number of possible outcomes.

According to the given condition:

Part A: The theoretical probability of a fair coin landing on heads is 1/2 or 0.5.

Part B: Let's record the outcomes of flipping a coin 14 times and count the frequency of each outcome:

HHHHHHHHHHHHHH - 14 heads

TTTTTTTTTTTTTT - 14 tails

The frequency of heads is 14, and the frequency of tails is also 14.

To find the experimental probability of landing on heads, we divide the frequency of heads by the total number of flips:

experimental probability of heads = frequency of heads / total number of flips = 14 / 28 = 0.5

The experimental probability of landing on heads is the same as the theoretical probability. This is not surprising since the number of trials is large enough to approach the theoretical probability.

Therefore,The theoretical probability of a fair coin landing on heads is 1/2 or 0.5. The experimental probability of landing on heads is also 0.5, which matches the theoretical probability.

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please answer these questions fast

Answers

According to the information, to estimate the total cost for a 50-kilometer taxi ride by extending the line to a distance of 50 kilometers and reading off the corresponding y-value, which is approximately $105.00.

How to create a Table of values?

Distance (km) Total Cost ($)

0 5.00

1 7.00

2 9.00

3 11.00

4 13.00

5 15.00

b. The graph of the total cost C as a function of the distance d up to 10 kilometers is a linear function with a slope of $2.00/km and a y-intercept of $5.00.

c. Start value and rate of change:

The start value of the total cost is $5.00, which is the initial fee charged by the taxi service. The rate of change is $2.00/km, which is the cost per kilometer travelled.

d. Equation:

The equation that models the total cost C of using the taxi service for a distance of d kilometers is:

C = 2d + 5

e. Total cost of a 50-kilometer taxi ride:

Using the equation from part d, we can calculate the total cost of a 50-kilometer taxi ride:

C = 2(50) + 5 = $105.00

Alternatively, we could use the graph to estimate the total cost for a 50-kilometer taxi ride by extending the line to a distance of 50 kilometers and reading off the corresponding y-value, which is approximately $105.00.

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the following correlation matrix shows the pearson correlations between various baseball pitching related statistics, of which the number of wins (w) is considered to be a criterion measure of pitching performance by a team. which statistic has an inverse relationship with the number of wins?

Answers

To decide which measurement has a reverse relationship with the number of wins, we ought to seek for a relationship coefficient with negative esteem. A negative correlation coefficient shows that as one variable increments, the other variable tends to diminish.

Without seeing the real relationship framework, we cannot point out the precise statistic that has a reverse relationship with the number of wins. In any case, ready to search for the relationship coefficient that features negative esteem.

For illustration, in the event that we have a relationship network like this:

markdown

| W | Period | WHIP | SO/9 | BB/9 |

----------------------------------------------

W | 1 | -0.7 | -0.6 | 0.5 | -0.3 |

----------------------------------------------

Period | -0.7| 1 | 0.9 | -0.8 | 0.5 |

----------------------------------------------

WHIP | -0.6| 0.9 | 1 | -0.7 | 0.4 |

----------------------------------------------

SO/9 | 0.5| -0.8 | -0.7 | 1 | -0.4 |

----------------------------------------------

BB/9 | -0.3| 0.5 | 0.4 | -0.4 | 1 |

----------------------------------------------

We are able to see that the relationship coefficient between the number of wins (W) and the earned run normal (Time) is -0.7, which indicates a strong negative relationship. This implies that as the Time increments (showing poorer pitching execution), the number of wins tends to diminish. Subsequently, Time has a reverse relationship with the number of wins.

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Two boys share 35notebooks in the radio of 2:5. How many notebooks does each get? ​

Answers

When two boys share 35notebooks in the ratio of 2:5, each boy will get these numbers of notebooks:

Boy A = 10Boy B = 25.

What is the ratio?

The ratio refers to the relative or comparative size of one value, quantity, or number compared to another.

Ratios are depicted as proportional values using fractions, decimals, percentages, or the standard ratio form (:).

Ratios give the equivalent values of quantities that are compared.

The total number of notebooks to share between two boys = 35

The sharing ratio = 2:5

The sum of ratios = 7 (2 + 5)

The share of Boy A = 10 (²/₂ x 35)

The share of Boy B = 25 (⁵/₇ x 35)

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find the product of (3-2x)(2x+1)(x-5)

Answers

Answer:

the product of (3-2x)(2x+1)(x-5) is -4x^3 + 26x^2 - 19x - 75.

Step-by-step explanation:

To find the product, we need to multiply these three expressions:

(3 - 2x)(2x + 1)(x - 5)

Let's start by multiplying the first two expressions using the distributive property:

(3 - 2x)(2x + 1) = 6x - 4x^2 + 3 - 2x

Now we can multiply this result by the third expression using the distributive property again:

(6x - 4x^2 + 3 - 2x)(x - 5) = 6x^2 - 34x + 15x - 75 - 4x^3 + 20x^2

Simplifying this expression by combining like terms, we get:

-4x^3 + 26x^2 - 19x - 75

Therefore, the product of (3-2x)(2x+1)(x-5) is -4x^3 + 26x^2 - 19x - 75.

1. A triangle has sides that measure 5
cm, 2.5 cm, and 4.3cm. What is the
perimeter of the triangle? |

Answers

Answer:

11.8 cm

---------------------

Perimeter is the sum of side lengths.

Given sides:

5 cm, 2.5 cm and 4.3 cm

Find the perimeter by adding up side lengths:

P = 5 + 2.5 + 4.3 = 11.8 cm

What is the area of a right triangle with a height of 6-yards and a base of 22 yards?
O 34 yds²
O 68³
yds²
O 132 yds²
O
137/ yds²

Answers

Answer:

68 3/4 yds

Step-by-step explanation:

trust me :)

Answer:

see below

Step-by-step explanation:

area of triangle formula  = 1/2 base * height

so 1/2*6*22 =66

not sure why there's no choice of 66

Identify the area of the figure. PLEASE RESPOND ASAP TYSM!!!

Answers

Answer:

184 cm to the 3

Step-by-step explanation:

13x7 91+90+181 and add 3

Answer is the first choice 184 cm sq.

Let’s break down this figure into:
Long rectangle 7 x 20 = 140
Small rectangle 4 x 8 = 32
Triangle 8H x 3base = 1/2(8)(3) = 12

Added together equals 184cm sq.

I added the attachment to show how I broke it down

1.572 × 108 troy oz of silver were used in the United States in 1980. How manykilograms is this? (1 troy oz = 31.1 g)A) 4.89 × 106 kg D) 4.89 x 1012 kgB) 4.89 kg E) 5.05 × 10 3 kgC) 5.05 × 10 6 kg

Answers

First, we need to convert the troy ounces of silver to grams:

1 troy oz = 31.1 g

1.572 x 10^8 troy oz = (1.572 x 10^8) x (31.1 g/troy oz)
= 4.88692 x 10^9 g

Next, we need to convert grams to kilograms:

4.88692 x 10^9 g = 4.88692 x 10^6 kg

Therefore, the answer is A) 4.89 x 10^6 kg

100% of what number is 6​

Answers

The answer is 6 because 100% of a number is always just the number

Answer:

6

Step-by-step explanation:

Half of six is 3. That would be 50%. 6 at 100% is simply 6.

Creating an Exponential Model
In this activity, you will formulate and solve an exponential equation that models a real-world situation.
Emma doesn't have experience using credit cards. In fact, she just got her first one. She is also about to start her first year
of college. She uses her new credit card to purchase textbooks for her classes. The total comes to $300. These are the
terms of her credit card:
• It has a 15% annual interest rate.
• The interest is compounded monthly
• The card has $0 minimum payments for the first four years it is active.
The expression that models this situation is P(1 + r/n)^nt, where (1 + r/n) represents the growth factor of the interest rate. Emma also wonders how long it will take her balance of $300 to reach $450

Answers

It will take Emma about 4.04 years for her balance to reach $450, assuming she doesn't make any payments and the interest rate remains constant.

The formula that models this situation is P(1 + r/n)ⁿˣ, where P is the principal (the initial amount borrowed or invested), r is the annual interest rate, n is the number of times the interest is compounded per year, and t is the time (in years) that the money is invested or borrowed.

In this case, the principal is $300, the annual interest rate is 15%, the interest is compounded monthly (so n = 12), and we want to find the time it takes for the balance to reach $450.

P = 300(1 + 0.15/12)¹²ˣ

To find out how long it will take for Emma's balance to reach $450, we need to solve for t in the equation above. We can do this by using logarithms to isolate the variable t:

=>  log(1.5) = 12t x log(1 + 0.15/12),

we can use the properties of logarithms. Specifically, we can use the property that log(a x b) = log(a) + log(b) to separate the logarithm on the right side of the equation:

log(1.5) = 12t x log(1 + 0.15/12)

log(1.5) = log[(1 + 0.15/12)¹²ˣ]   (using log(a x b) = log(a) + log(b))

Now we have two logarithms that are equal to each other. Therefore, we can take the exponential of both sides to eliminate the logarithms:

1.5 = (1 + 0.15/12)¹²ˣ

Simplifying this expression further, we get:

1.5 = (1.0125)¹²ˣ]

log(1.5) = log[(1.0125)¹²ˣ]]

log(1.5) = 12t x log(1.0125)

Finally, we can solve for t by dividing both sides by 12 x log(1.0125):

log(1.5) / [12 x log(1.0125)] = t

t ≈ 4.04

Therefore, the simplified expression is t ≈ 4.04.

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Find the distance traveled by a particle with position (x, y) as t varies in the given time interval. x = 3 sin^2 (t), y = 3 cos^2 (t); 0 less than or equal to

Answers

From distance formula, the distance covered by a particle with position (x, y) as time, t is equals to the [tex] 18\sqrt{2}[/tex].

The distance d, traveled by the particle with position vector, r(t) = <x(t), y(t) > over the interval [a,b] is calculated by following

[tex]d = \int_{a}^{b} ( (\frac{dx}{dt})² +(\frac{dy}{dt})² )dt[/tex]. We have a particle with position value (x, y) as t varies in the time interval. The parametric equations are, x = 3 sin² (t), y = 3 cos²(t), on the

time interval [0,3π]. Now the derivative of above parametric equations with respect to time t are [tex]\frac{dx}{dt} = 6 sin(t)cos(t) [/tex] = 3 sin(2t)

[tex]\frac{dy}{dt} = -6 sin(t)cos(t) [/tex]

= - 3 sin(2t)

Therefore, the required distance travelled by particle in the interval [0,3π] is written as [tex]d = \int_{0}^{3π} \sqrt{( (3 sin(2t))² + (-3 sin(2t))²) dt} \\ [/tex]

[tex]= \int_{0}^{3π} \sqrt{ ( 9 sin²(2t) + 9sin²(2t))}dt \\ [/tex]

[tex]= \int_{0}^{3π} \sqrt{18sin²(2t)dt}[/tex]

[tex]= 3\sqrt{2}\int_{0}^{3π} |sin(2t)|dt[/tex]

[tex]= 3\sqrt{2}[ \int_{0}^{\frac{π}{2}} sin(2t)dt - \int_{\frac{π}{2}}^{π} sin(2t)dt + \int_{π}^{\frac{3π}{2}} sin(2t)dt - \int_{\frac{π}{2}}^{2π}sin(2t)dt + \int_{2π}^{\frac{5π}{2}}sin(2t)dt - \int_{\frac{5π}{2}}^{3π}sin(2t)dt \\ [/tex]

[tex]= 3\sqrt{2}([ \frac{cos(2t)}{2}]_{0}^{\frac{π}{2}} - [\frac{cos(2t)}{2}]_{\frac{π}{2}}^{π} + [\frac{cos(2t)}{2}]_{π}^{\frac{3π}{2}} - [\frac{cos(2t)}{2}]_{\frac{3π}{2}}^{2π} + [\frac{cos(2t)}{2}]_{2π}^{\frac{5π}{2} }- [ \frac{cos(2t)}{2}]_{\frac{5π}{2}}^{3π})\\ [/tex]

[tex]= 3\sqrt{2}([ \frac{1}{2} +{\frac{1}{2}] - [\frac{-1}{2}- \frac{1}{2}}] + [\frac{1}{2}+ \frac{1}{2}] - [\frac{-1}{2} - \frac{1}{2}] + [\frac{1}{2} + \frac{1}{2}]- [ \frac{-1}{2} - \frac{1}{2}])\\ [/tex]

[tex]= 3\sqrt{2}(6)[/tex] =[tex]= 18\sqrt{2}[/tex]

Hence, the required distance is [tex] 18\sqrt{2}[/tex].

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A mountain bike tire completes 15 revolutions and travela 146 feet. Rounded tot the nearest in, how many inches is the diameter of the vike's tire?

Answers

The diameter of the bike's tire is 2.325 inches.

What is circumference?

Circumference of the circle or perimeter of the circle is the measurement of the boundary of the circle. Whereas the area of circle defines the region occupied by it.  If we open a circle and make a straight line out of it, then its length is the circumference. It is usually measured in units, such as cm or unit m.

A mountain bike tire completes 15 revolutions and travels 146 feet.

Now,

1 revolution of a tire is equal to the circumference of the tire.

Since we have 15 revolutions, we should take 15C=146

where C=πd where π is pi (use 3.14 or the pi symbol).

Our equation is:

20πd=146.

Then solve for d:

20 × 3.14 × d = 146

62.8d = 146

d = 146/62.8

d = 2.325 inches.

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The population density of Orangeland is 18 orange trees per acre. Exactly 792 orange trees grow in Orangeland. How many acres are in Orangeland? a. 40 b. 44 c. 53 d. 66

Answers

Answer:

44

Step-by-step explanation:

there are 792 trees but one acre has 18,

so to find the number of acres divide 792 by 18,

which would give you 44.

According to the given condition, the answer is (b) 44. There are 44 acres in Orangeland.

What is an expression?

Expressions can be simple or complex, and can be used in many different contexts depending on the specific programming language or mathematical system being used.

According to the given information:

The problem asks us to find the number of acres in Orangeland given the population density of orange trees and the total number of trees. We can use the formula for population density, which relates the number of individuals (in this case, orange trees) to the area they occupy.

The formula for population density is:

Population density = number of individuals/area

We can rearrange this formula to solve for the area:

Area = number of individuals/population density

In this problem, we are given the population density of Orangeland, which is 18 orange trees per acre. We are also given the total number of orange trees, which is 792. To find the area of Orangeland, we can substitute these values into the formula:

Area = 792 / 18

Simplifying this expression, we get:

Area = 44

Therefore, According to the given condition, the answer is (b) 44. There are 44 acres in Orangeland.

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