Solve the problem.Suppose a tank contains 100 gallons of a solution of 10 lb of salt dissolved in water, which is kept uniform by stirring. If pure water is allowed to flow into the tank at a rate of 3 gallons per minute, and the mixture flows out at a rate of 2 gallons per minute, find an expression for the amount of salt in the tank after t minutes.

A. y = 
B. y = 
C. y = 
D. y = 100 (t - 100)2


Answer: B

Mathematics

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