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Problem-Solving and Data Analysis / Ratios, rates, proportional relationships, and units Difficulty: Medium

Pure beeswax has a density of 0.555 ounce per cubic inch. An online company sells pure beeswax at a price of $8.00 per ounce. What is the selling price, in dollars per cubic inch, for pure beeswax purchased from this company?

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Explanation

The correct answer is 4.44. The selling price, in dollars per cubic inch, is found by multiplying the density, in ounces per cubic inch, by the unit price, in dollars per ounce: open parenthesis, 0 point 5 5 5 ounce, over 1 cubic inch, close parenthesis, times, open parenthesis, 8 dollars, over 1 ounce, close parenthesis yields 4 point 4 4 dollars over 1 cubic inch . Thus, the selling price, in dollars per cubic inch, is 4.44.