Solve the problem.Dmitri needs 9 liters of a 69% solution of sulfuric acid for a research project in molecular biology. He has two supplies of sulfuric acid solution: one is an unlimited supply of the 81% solution and the other an unlimited supply of the 54% solution. How many liters of each solution should Dmitri use?
A. 4.5 L of 81% solution; 4.5 L of 54% solution
B. 4 L of 81% solution; 5 L of 54% solution
C. 5 L of 81% solution; 4 L of 54% solution
D. 5.5 L of 81% solution; 3.5 L of 54% solution
Answer: C
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