What's the radius of a circle with an area of 16π ft2

r = 4 ft

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

We know the area is

16 pi = pi r^2

Divide each side by pi

16 pi/pi = pi r^2/pi

16 = r^2

Take the square root of each side

sqrt (16) = sqrt (r^2)

4 = r