Sand dollars are animals that live buried in the sand of shallow coastal waters. The thin circular body of a sand dollar is usually 2 to 4 inches wide. Find the area of a sand dollar that is 3 inches wide.

Area = πr^2

The diameter is twice the area.

The diameter is the width of a circle.

This means the radius is (3/2).

A = π(3/2)^2

A = π(9/4)

A = 9π/4

A = 7.0685834706

A = 7.07