Question

John pizza sells one 18-inch or two 12 inch pizza for $10.99. Determine which size gives more pizza

Answer 1

Using the formula for the area of a circle calculate the area for both deals.

for the 18-inch pizza

`\begin{gathered} A=\pi\cdot r^2 \\ A=\pi\cdot18in^2 \\ A=324\pi\approx1017.88in^2 \end{gathered}`

for the two 12-inch pizza

`\begin{gathered} A=2\cdot\pi\cdot r^2 \\ A=2\cdot\pi\cdot12^2 \\ A=288\pi\approx904.78in^2 \end{gathered}`