Math
posted by Kiera .
A small pizza is of diameter 14 cm and a medium pizza 28 cm.
Is a medium pizza twice as large as a small pizza? Use calculations to support your answer.
A medium pizza is cut into 3 equal parts, and each part is sold for $15. A small pizza is sold for $12. Which is a better buy? Use calculations to support you answer.

Small pizza:
A = pi * r^2
A = 3.14 * 7^2
A = 3.14 * 49
A = 153.86 square centimeters
What is the area of the medium pizza?