# If a 10​ pepperoni pizza from a pizza parlor costs ​\$9.14​, what should a 12​ pizza from the pizza parlor​ cost?

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• Anonymous
2 months ago

Snowflake Economics LMAO

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• 9.14 / 10 * 12 = \$10.97

• Not unless your pizza is measured in a line rather than in the round.

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• If a 10​ pepperoni pizza from a pizza parlor costs ​\$9.14​,

a 12​ pizza from the pizza parlor​ should cost \$10.97.

• Pizza is round, not linear.

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• compute square inches and extrapolate, or go hungry.

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• As someone who has actual bought pizza I'm going to assume that you are talking about a 10 inch vs 12 inch pizza. Where the size is the diameter of the pizza.

The area is proportional to the square of the diameter

therefor the price will also be proportional to the square of the diameter

p/9.14 = (12/10)²

p = (12/10)² * 9.14

p = 144 / 100 * 9.14

p = 13.1616

\$13.16 <––––––

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• We know the price must be proportional to the area of pizza. Thus it is proportional to the square of the diameter. Let x be the price:

9.14/10² = x/12²

x = 12² * 9.14/10² = \$13.16 <<<

• @dogsafire: you give the general wizardry of idiots here way too  much credit.

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• The math concept here is equivalency. So it's just like 1/2 = X/4 and solving for X to make the two fractions equivalent. The only difference is that your numbers are different. You have 9.14/10 = X/12. Solve for X, which is your numerator and you'll have how much that 12 inch or slice pizza will cost. In other words, you're getting your cost per inch or slice and using this to get your answer.

Source(s): I've taught math on the college and in the public schools. And have helped out lots of students with problems like this.
• In this particular case I do wish you had given a specific answer. A 10" pizza for \$10 DOES NOT equate to \$12 for a 12" pizza. The unit of cost is a SQUARE inch.

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• It’s 91.4¢ per pepperoni so 12 pepperoni pizza would cost \$10.97.

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