Question

(40 POINTS) PLEASE help asap i need this done soon! ​

Answer 1

Explanation:

first step= the formula for a circle is

A=πr2 (a= pi r squared)

use 3.14 for every circle problem to help you solve it.

So,

3.14 (2.5) use the radius then add the 3.14 (2.5)2 (squared)

Squared means times it by that number, not two. for example.; if I were to square 3.14, I would do 3.13 times 3.14. not 3.14 times 2.

so do 2.5 times 2.5 and you should get 6.25.

Next write 3.14 (6.25) and times 3.14 by 6.25 and you should get the answer of 19.625.

I'm not sure how to round it to the nearest whole number, But i'm sure you can just google it. I hope this helped!

Answer 2

A. 8 ft

B. 660 times

Explanation:

A. Finding the circumference:

The formula for the circumference is

C = πD where D is the diameter

We are given D = 2.5, and to use π = 3.14, so plug those values in...

C = π(2.5) = (2.5)(3.14)

C = 7.85, which rounds to 8 (the nearest whole number)

B. How many times will it rotate in one mile.

Divide 5,280 by 8 to see how many times the tire will rotate (each time it rotates once the tire travels 8 ft)

5,280/8 = 660