Hi there!
The formula for finding the volume of a sphere is
V = 4/3 × pi × r³
Your problem gives you the radius, so you can just plug in the number into the formula.
r = 14
V = 4/3 × pi × 14³
4/3 × pi × 2744
3658.67 × pi
3658.67 × 3.14 = 11488.2238
You can round up the number to
11488.22
So the volume of the sphere is 11488.22mm³