Question: A MIXTURE PROBLEM A tank initially contains 10 gal of brine with 2 lb of salt. Brine with 1.5 lb of salt per gallon enters the tank at the rate of 3 gal/min, and the well-stirred mixture leaves the tank at the rate of 4 gal/min. It can be shown that the amount of salt in the tank after t min is x lb where
x = f(t) = 1.5(10 - t) - 0.0013(10 - t)4 (0 ≤ t ≤ 10)
What is the maximum amount of salt present in the tank at any time?
