Andrew M. answered • 04/07/17

Tutor

New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

With round pizza we need to

find the area of each pizza in

square inches, then determine

the difference.

The area of a circle is given by:

A = πr

^{2}12 inch diameter, radius = 6

a = π(6

^{2}) = 36π in^{2}8 inch diameter, radius = 4

a = π(4

^{2}) = 16π in^{2}Difference: 36π - 16π = 20π in

^{2}using 3.14 for pi, the difference is

20(3.14) = 62.8 in

^{2}