Question

The radius of a sphere is 3 in. What is the sphere's volume? Round to the nearest tenth, if necessary.

Answer 1

The volume of a sphere is 4/3 pi, times its radius cubed.
To cube the radius you multiply the radius times itself 3 times.
3 x 3 x 3 =27
4/3 pi x 27 = 113.1. 
113.1 rounded to the nearest tenth is the same.