A tank contains 350 liters of fluid in which 20 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 9

A 300 gallon tank initially contains 90 gallons of brine containing 400 Ibs. of salt. Brine containing 1 lb. of salt per gallon enters the tank at 4gal/s, and the well-mixed brine flows out of the tank at 1 gal/s. How much salt will the tank contain when it is full of brine?

a tank contains 50kg of salt and 1000 L of water. A solution of a concentration 0.025 kg of salt per liter enters a tank at the rate 9L/min. The solution is mixed and drains from the tank at the same rate.  what is the concentration of our solution in the tank initially concentration = ? (kg/L) find the amount of salt in the tank after 3 hours. amount = ? kg c) Find the concentration of salt in the solution in the tank as time approaches infinity. concentration = ? (kg/L)

A large tank contains 120 gallons of pure water. Brine containing 1.5 lbs. of salt per gallon of water enters the tank at a rate of 4 gal/min. The mixture leaves the tank at a slower rate of 2 gal/min. Find an expression for the amount of salt in the tank at time t.