Question: Problem 4: A 150 gallon tank initially contains 70 gallons of pure water. Water with a concentration of pounds of salt per gallon is added

Problem 4: A 150 gallon tank initially contains 70 gallons of pure water. Water with a concentration of pounds of salt per gallon is added to the tank at 2 gal/min, and the resulting solution leaves at a rate of 1 gal /min. Find the quantity, Q(t), of pounds of salt in the tank for times 0

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