View answer: ?In each of the following exercises, set up an equation or inequality and
Chapter 4, Problem 45(choose chapter or problem)
In each of the following exercises, set up an equation or inequality and solve the problem. Be sure to indicate clearly what quantity your variable represents. Round to the nearest tenth where necessary.
A chemist wants to make 90 ml of a 40% hydrochloric acid solution. She also wants to use all of the 30 ml of 20% hydrochloric acid she has on hand. What percent solution must she use for the remaining 60 ml?
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