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Comparison of prices of circle-shaped pizzas

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Medium pizza with a 12 inch diameter sells for $5, and Large pizza with a 16 inch diameter sells for $10.

Which pizza is the better buy, and why?

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Solution Summary

A statement of the computations that need to be carried out in order to answer the question is provided. The computations themselves are carried out and explained in detail.

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The key to answering this question lies in comparing the ratio of the PRICES of the two pizzas to the ratio of their AREAS. We assume that the thicknesses of the two pizzas are EQUAL, since we are given no information that suggests otherwise.

These are circular-shaped pizzas. The formula ...

Solution provided by:
Georgia Martin, PhD
Education
  • AB, Hood College
  • PhD, The Catholic University of America
  • PhD, The University of Maryland at College Park
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