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A tank contains 300-gallon of pure water. At time t = 0, a solution containing 2...

A tank contains 300-gallon of pure water. At time t = 0, a solution containing 2 lb of salt per gallon flows into the tank at a rate of 1 gallon per minute, and the well-stirred mixture flows out at a rate of 2 gallons per minute. Find the amount(in lb) of salt Q in the solution as a function of t in minutes.

please show work and explain thank you

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