What is. One fifth times40?

Answers

Answer 1

Answer: This is basically 40/5 or just 8

Answer 2

Answer: the answer is 40/5
40 over 5

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What is the value of n? 9×27+2×31-28=n

What is (x^3-4x+2x+3) divided by (x-3)

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Below is your division, in long division from.
Explanation:
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Ed can run 10 miles in 2 hours at a steady rate . how many hours will it take him to run 30 miles ?

Answers

Answer:

Step-by-step explanation:

It should take six hours.

Ten times three would make thirty, doing the same to the number of hours[2 hours] we multiply it by three which leaves us with six miles.

Ed runs thirty miles in six hours.

Answer:

6 hours

10 miles takes 2 hours

so 30 miles will take 6 hours

Simplify. 7(3x-4y+2) Remember who ever gives me the best answer is the brainliest!!

Answers

21x-28y+14 is the answer

Hannah buys 3 packs of 36 exposure films and 2 packages of 24 exposure films. She uses 8 rolls of film. How many rolls does she have left?

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Well that's easy. You see first you multiply 3x36 then you multiply 2x24. Now you want to to add this two numbers. Lastly, you subtract 8 from your answer.Hope this helped

First you multiply 3•36 and then multiply 2•24 then add both products and subtract the andwer by 8 (148)

Evaluate
3/7 ÷ 1/7
Struggling with this question

Answers

Answer:3

Step-by-step explanation:We first find the reciprocal of the second fraction then the division sign changes into multiplication then you work out.

3/7 divided by 1/7 cancel the divide sign and replace it with a multiplication sign which will be 3/7 x 1/7. 7 will switch place with one therefore it will be 3/7 x 7/1. Cancel the 7s which will be equal to 3/1 the answer is 3

A circular oil spill continues to increase in size. The radius of the oil spill, in miles, is given by the function r(t) = 0.5 + 2t, where t is the time in hours. The area of the circular region is given by the function A(r) = πr2, where r is the radius of the circle at time t.Explain how to write a composite function to find the area of the region at time t.

Answers

Answer:

The area at time t is given by $A(t) =\pi (4t^2+2t+0.25).$

Step-by-step explanation:

We know the radius $r(t)$ of the oil spill as a function of time, and we know the area $A(r)$ as a function of radius, and we want the area at time t. In other words we are looking for area as a function of time $A(t)$

We find $A(t)$ by putting $r(t)$ into $A(r)$ as a substitute to r:

$A(t) = A(r(t))= \pi r(t)^2 =\pi (0.5 + 2t)^2={\pi (4t^2+2t+0.25).}$

$\boxed{A(t) =\pi (4t^2+2t+0.25).}$

Which is our answer.

Final answer:

To find the composite function for the area of the oil spill over time, replace 'r' in A(r) = πr2 with the function r(t). The function becomes A(t) = π(0.5 + 2t)2.

Explanation:

In order to find the function that represents the area of the oil spill over time, we need to write a composite function. This means we plug the function r(t) into A(r). Since r(t) = 0.5 + 2t, you can replace every instance of 'r' in A(r) = πr2 with (0.5 + 2t) to get the area as a function of time 't'. So, the composite function becomes A(t) = π(0.5 + 2t)2. Now we have a composite function that represents the area of the oil spill, denoted by A(t), as a function of time. The function is: A(t) = π(0.5 + 2t)2.

Learn more about Composite Functions here:

brainly.com/question/30143914

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