Write a system of equations for the problem and then solve using any method you have studied. A chemist wants to mix a solution containing 8% acid with another solution containing 28% acid. She needs to produce a total of 40 mL, and the concentration of acid in the final solution should be 17%. How much of each acid should she use?
A. 18 ml of 8%; 18 ml of 28%
B. 5 ml of 8%; 35 ml of 28%
C. 22 ml of 8%; 18 ml of 28%
D. 18 ml of 8%; 22 ml of 28%
E. 22 ml of 8%; 22 ml of 28%
Answer: C
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