# Question: initially a very large tank contains 300 gallons of brine...

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Initially, a very large tank contains 300 gallons of brine with concentration of 3 grams of salt per gallon. At time t=0, brine with concentration of 8 grams of salt per gallon starts to flow in at the rate of 3 gallons per minute. Find the function A(t) of the amount of salt in the tank at time t provided. (a) the well-stirred brine flows out at the rate of 3 gal per minute (b) the well-stirred brine flows out at the rate of 1 gal per minute (c) the well-stirred brine flows out at the rate of 5 gal per minute