# Pre-Algebra Examples

The surface area of a sphere is equal to times Pi times the radius squared.

Substitute the value of the radius into the formula to find the surface area of the sphere. Pi is approximately equal to .

Move .

Multiply by .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

Raise to the power of .

The result can be shown in multiple forms.

Exact Form:

Decimal Form: