A tank initially contains 100 gallons of a solution that holds 10 pounds of a chemical. A solution containing 1 pound of the chemical runs into the tank at a rate of 4 gallons per minute, and the well-mixed mixture runs out of the tank at a rate of 6 gallons per minute.
a. How much chemical is in the tank after 25 minutes?
b. How much chemical is in the tank after 50 minutes?
Differential Equations and Rate of Change are investigated. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.