Question

The area of circle z is 64 pi ft^2 What is the value of r?

Answer 1

we know that

The area of the circle is equal to

$A=\pi r^{2}$

where

r is the radius of the circle

In this problem we have

$A=64\pi \ ft^{2}$

substitute in the formula and solve for r

$64\pi=\pi r^{2}$

Simplify

$64=r^{2}$

Square root both sides

$r=8\ ft$

therefore

the answer is

The value of r is $8\ ft$

Answer 2

To find area of a circle, one must perform the equation "pi(r)^2" we have all information but the radius which has become inclusive in the question. To draw out the radius, all you gotta do is defuse 64 into its square root-8. The radius is 8.