Would i use the volume formula and what answer would i get?

Formula
V = 4/3 pi r^3

Substitute and Solve
r = 5 cm
pi = 3.14
V = 4/3 * 3.14 * 5 * 5 * 5                   [which is r^3]
V = 4/3 * 3.14 * 125                          [Multiply 4 * 3.14 * 125 together]
V = 1570 cm^3 / 3                            Divide by 3
V = 523.3 cm^3 

523.3 cm^3 <<<< answer.

Xis equal to three