# Calculus

A large tank is filled with 200 gallons of pure water. Brine containing 1 pound of
salt per gallon is pumped into the tank at the rate of 5 gallon per minute. The
well-mixed solution is pumped out at the same rate.
(a) Find the number A(t) of pounds of salt in the tank at any time t.

1. 👍 0
2. 👎 0
3. 👁 453

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