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8 pts.) A tank contains 200 L of brine in which 15 kg of salt is dissolved. Brine which contains 2 kg of salt per

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8 pts.) A tank contains 200 L of brine in which 15 kg of salt is dissolved. Brine which contains 2 kg of salt per liter pumped into the tank at the rate of 4 L/min. The well-mixed solution is pumped out at the same rate. Find a lifferential equation and initial value for A(t) the amount of salt, in kg, at time t minutes. Do not solve the lifferential equation

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