Question
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.
Answers
Ms. Sue
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 * 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.
Lori
A = pi x r^2
A = 3.14 x 7 x7
A = 153.86
20/153.86 = $0.13 per square inch
A = 3.14 x 7 x7
A = 153.86
20/153.86 = $0.13 per square inch
Ms. Sue
Right! :-)
Lori
Thank you!
Ms. Sue
You're welcome.