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Answer on Algebra Question for Elise Ruby

Question #11930
Find the cost per ounce of a sunscreen made from 24 ounces of a lotion that costs $1.90 per ounce and 50 ounces of a lotion that costs $3.25 per ounce.
Expert's answer
Let's make an estimation. The final price of a sunscreen is

P = 24*$1.90 + 50*$3.25 = $45.6 + $162.5& = $208.1.

The weight of a sunscreen is

W = 24 + 50 = 74 ounces.

So, the cost per ounce of a sunscreen is

U = P/W = $208.1/74 = $2.812(162) per ounce.

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18.07.2012 08:45

Total cost of (24+50=74 ounces) of both lotion used to make sunscreen are = $1.90*24 + $3.25*50
= $208.1
so the cost of sunscreen per ounce = $208.1 / 74 = $2.81

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