Math 157
posted by Lori .
A 7 inch pizza cost $8 and a 14 inch pizza costs $20. Tommy says the smaller pizza is a better buy because the larger pizza is twice as big and more than twice as expensive. Do you agree with his reasoning? Explain why or why not.

Area of 7 inch pizza:
A = pi * r^2
A = 3.14 * 3.5 * 3.5
A = 38.465 square inches
8/38.465 = $0.21 per square inch
Follow the above procedure to find the area and cost per square inch of the larger pizza. 
A = pi x r^2
A = 3.14 x 7 x7
A = 153.86
20/153.86 = $0.13 per square inch 
Right! :)

Thank you!

You're welcome.
Respond to this Question
Similar Questions

Geometry
Alonso can't decide which size pizza to order. The 10inch cheese and sausage pizza is $7.99, while the 12inch deluxe is $8.99. The dimensions given are the diameters of the pizzas. If he gets the 10inch pizza, the total price will … 
Math word problem
Alonso can't decide which size pizza to order. The 10inch cheese and sausage pizza is $7.99, while the 12inch deluxe is $8.99. The dimensions given are the diameters of the pizzas. If he gets the 10inch pizza, the total price will … 
math
Alonso can't decide which size pizza to order. The 10inch cheese and sausage pizza is $7.99, while the 12inch deluxe is $8.99. The dimensions given are the diameters of the pizzas. If he gets the 10inch pizza, the total price will … 
math
Tiny is ordering a pizza and cant decide between a round pizza with a diameter of 4 inches or a rectangular pizza that is 12 inches by 14 inches. The round pizza is 9.50 and the rectangular pizza is 10.00. Which is larger? 
Math
What is better buy? A square 8in. pizza that cost $10 or a round pizza with a 9 inch diameter that also costs $10 Please explain how answer is found. 
Math (Area of Shapes)
Suppose that when pizza dough is rolled out it costs 25 cents per square foot, and that sauce and cheese when spread out on a pizza have a combined cost of 60 cents per square foot. Let's say sauce and cheese are always spread out … 
geometry
Papa's Pizza charges $0.05 per square inch of pizza. Pizza is measured by the diameter. How much will pap's Pizza charge for a 7inch, 10inch, and 14inch pizza? 
Math (Variation)
The cost of a pizza varies directly as the square of its radius. If a pizza with a 6inch radius costs ₱148.00, how much should a pizza with an 11inch radius cost? 
Math
Cougar Pizza Parlor has just opened up across the street. You are thinking of inviting some friends over for pizza and ordering from Cougar's. You want to get the most pizza for the money. The menu shows the following prices. 6 inch … 
Math
A 6inch pizza costs $3.50. A 12inch pizza costs $11. How much less is the area of the 6inch pizza than the area of the 12inch pizza?