Question

Help?

a) Circumference = 2πr
= 2π(2.5 ft)
= 5π ft

b) Circumference of tire = 5π ft
Distance traveled in 1 rotation = 5π ft
Number of rotations to travel 1 mile = 5,280 ft / 5π ft
= 1056/π rotations
≈ 333.5 rotations

Answer 1

The area of the circle is equal to

Explanation:

we know that

The area of circle is equal to

where

r is the radius of the circle

In this problem we have

substitute