Question

A sphere has a diameter of 5 inches.

Answer 1

By definition, the volume of a sphere is given by:
 $V = (4/3) * ( \pi ) * (r ^ 3)$
 Where,
 r: is the radius of the sphere
 The radius of the sphere is:
 $r = d / 2$
 Where,
 d: diameter of the sphere
 Substituting values we have:
 $r = 5/2 r = 2.5$
 Then, the nolumen is given by:
 $V = (4/3) * (3.14) * (2.5 ^ 3) V = 65.4 in ^ 3$
 Answer: 
 the volume of the sphere is:
 65.4 in³