The cost of a pizza varies directly with the

length of the diameter. If a pizza with a

12-inch diameter costs $8.64, how much

should a pizza with a 16-inch diameter cost?

Answer: A 16 inch pizza is $11.52

Step-by-step explanation:

$8.64 / 12 = $0.72

$0.72 x 16 = $11.52

Take the amount ($8.64) and divide it by 12 (for the 12 inch pizza) and you get $0.72 for every inch of the pizza.

Then take $0.72 and times it by 16 (for the 16 inch pizza) and you get $11.52 and there is your answer.