Question 9 (10 points) A tank contains 150 liters of fluid i…
Question 9 (10 points) A tank contains 150 liters of fluid in which 10 grams of salt is dissolved. Pure water is then pumped into the tank at a rate of 5 L/min; the well-mixed solution is pumped out at the same rate. Find the number A(t) of grams of salt in the tank at time t.