pure water 3 gal/min mixture 1 gal/min mixture 4 gal/min mixture 3 gal/min Assume that tank A contains 150 gallons of water in which 30 pounds of salt is dissolved. Suppose tank B contains 75 gallons of pure water. Liquid is pumped into and out of the tanks as indicated in the figure; the mixture exchanged between the two tanks and the liquid pumped out of tank B are assumed to be well stirred. Write an IVP for A(t) and B(t), the amount of salt in pounds in each tank at time t.

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