Differential Equations Quiz
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FIRST-ORDER DIFFERENTIAL EQUATIONS
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A tank initially contains 100 gallons of water with 20 pounds of salt dissolved in it. Water containing 0.5 pounds of salt per gallon flows in at 3 gallons per minute, and the well-mixed solution flows out at 2 gallons per minute. If S(t) represents the amount of salt at time t, which differential equation with initial condition correctly models this situation?
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