The mini pizza has a 6-inch diameter, and the medium pizza has a diameter twice that of the mini pizza. How many more square inches of pizza are there in the medium than in the mini pizza? Round your answer to the nearest tenth.

Question

anonymous · Answer

A = pi*r^2
2r = d
1/2d = r
Mini Pizza]
d = 6
r =3
A = pi * 3^2 = 9pi
Medium Pizza]
d = 6*2 = 12
r = 6
A = pi * 6^2 = 36pi
Difference: 36pi - 9pi = 27pi
pi = 3.14159
27 * 3.14159 = 75.39816
Rounded to tenths: 75.4 square inches larger

anonymous · Answer

thank you very much(: