Joey's Pizza Palace sells four sizes of pizza. 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

Diameter = radius*2 --> Diameter/2 = radius
The area of something round is given by: pi * r^2

anonymous · Answer

If the mini pizza has a 6 inch diameter it means the radius of a mini pizza is 3 inches. And you can calculate the area of the mini pizza.
The medium pizza diameter was twice that of the mini pizza meaning 6*2inches = 12 inches. The radius will be 6 inches. Now you have 2 areas, the mini pizzas and the medium pizzas.

anonymous · Answer

I did it and got 84.8 (I rounded to the nearest tenth) Original answer was 84.78. Was the answer right?