A 1500-Liter Tank Contains 70 Liters of a 30% Acid

question 58

Multiple Choice

A 1500-liter tank contains 70 liters of a 30% acid solution and you add x liters of a 70% acid solution to the tank. If the function C, which represents the proportion of acid to the total solution in the final mixture, is given by , what percent does the concentration of acid appear to be approaching as x increases without bound? (Ignore the physical constraint that .)

• A) 100%
• B) 30%
• C) 40%
• D) 70%
• E) 20%

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