Question

the area of circle z is $64\pi$ $ft^{2}$. what is the value of $r$? $r=\sqrt{\frac{area}{\pi}}$ $\bigcirc$ $r = 4$ ft $\bigcirc$ $r = 8$ ft $\bigcirc$ $r = 16$ ft $\bigcirc$ $r = 32$ ft

Explanation:

Step1: Substitute area into formula

$r = \sqrt{\frac{64\pi}{\pi}}$

Step2: Simplify the expression

$r = \sqrt{64}$

Step3: Calculate square root

$r = 8$

Answer:

B. $r = 8$ ft