So first we need to find the area of both using a=3.14radiusradius
to find the radius we need to divide 35 by 2 (large) and 30 by 2 (medium)
lets do the large first since the raidus is 17.5 we put it into a=3.1417.517.5
and then we get 961.63, for the medium we do a=3.141515 which is 706.50
now for the large 961.63 2 is 1923.26 and the price is 19.99
for the medium we do 706.50 3 which is 2119.5 and costs 24.99
So the medium pizzas are a better deal
