SOLUTION: To clean a concrete driveway, a contractor needs a solution that is 30% acid , How many ounces of a 50% acid solution must be mixed with 15oz of a 21% solution to obtain a 30% acid
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Question 786035: To clean a concrete driveway, a contractor needs a solution that is 30% acid , How many ounces of a 50% acid solution must be mixed with 15oz of a 21% solution to obtain a 30% acid solution? Answer by josgarithmetic(39618) (Show Source):
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