Answer:
9 ft
Explanation:
V = 4/3 pi r^3
We know the volume is 972 pi
Substituting in
972 pi = 4/3 pi r^3
Dividing both sides by pi
972 pi/pi = 4/3 pi/pi r^3
972 = 4/3 r^3
Multiply both sides by 3/4
3/4 *972 = 3/4 *4/3 r^3
729 = r^3
Take the cube root of each side
(729)^1/3 = (r^3)^1/3
9 =r