A tank contains 1000L of pure water. Brine that contains 0.05kgof salt per liter enters the tank at a rate of 5L/min. Also, brinethat contains 0.09kg of salt per liter enters the tank at a rate of10L/min. The solution is kept thoroughly mixed and drains from thetank at a rate of 15L/min. Answer the following questions.
1. How much salt is in the tank after t minutes? Answer (inkilograms):
S(t)=
2. How much salt is in the tank after 2 hours? Answer (inkilograms):
