Answer:
The radius of the sphere is 9 ft.
Step-by-step explanation:
Given : The volume of a sphere is 972π ft³.
To find : What is the radius of the sphere?
Solution :
The formula of volume of sphere is 
Where, Volume of the sphere is 972π ft³.
r is the radius of the sphere.
Substitute the value in the formula,



![r=\sqrt[3]{729}](https://tex.z-dn.net/?f=r%3D%5Csqrt%5B3%5D%7B729%7D)

Therefore, The radius of the sphere is 9 ft.