<PRE><B>Question 961537</B>
He is out of the 1% benzoyl peroxide needed to treat it. So he recommended that she buy the 5% benzoyl peroxide for human acne in the drug store and dilute it to 1%. How many teaspoons of water should Trish mix with 1 teaspoon of the 5% benzoyl peroxide to get 1% benzoyl peroxide?
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Equation:
benz + benz = benz
0.05*1 + 0*x = 0.01(1+x)
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Multiply thru by 100 to get:
5*1 + 0 = 1*1 + x
x = 4 (# of teaspoons of Water needed)
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Cheers,
Stan H.
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