Mixture In Exercises 35-38, consider a tank that at time
A 200-gallon tank is full of a solution containing 25 pounds of concentrate. Starting at time t - 0, distilled water is admitted to the tank at a rate of 10 gallons per minute, and the well-stirred solution is withdrawn at the same rate.
(a) Find the amount of concentrate Q (in pounds) in the solution as a function of r,
(b) Find the time at which the amount of concentrate in the lank reaches 15 pounds.
(c) Find the amount of concentrate (in pounds) in the solution as r -> oo.
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Calculus, Early Transcendentals
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