Spheres

Surface Area: S = 4πr2

Volume: V = πr3

Formulas

Example

Example

Find the radius of a sphere with volume 2304 ft3.

Example

A sporting goods store sells exercise balls in two sizes, standard (22-in. diameter) and jumbo (34-in. diameter). How many times as great is the volume of a jumbo ball as the volume of a standard ball?

Example

The radius of the sphere is multiplied by ¾. Describe the effect of the volume and the surface area.

Example

Pg. 719 #14-26 even, 30, 32

Pre-AP: Pg. 719 #14-26 even, 30, 32, 36, 38

Homework