1. The problem statement, all variables and given/known data A tank contains 1160 L of pure water. A solution that contains 0.03 kg of sugar per liter enters a tank at the rate 7 L/min The solution is mixed and drains from the tank at the same rate. a.) How much sugar is in the tank initially? b.) Find the amount of sugar in the tank after t minutes. c.) Find the concentration of sugar in the solution in the tank after 72 minutes. 2. Relevant equations 3. The attempt at a solution I made s(t) be the amount of salt at time 't' ds/dt = rate in - rate out Well the rate in would be the concentration times the rate... so ds/dt = (.03kg)(7L/min) - (s/1160)(7L/min) ds/dt = .21 - (7s/1160) Kind of get confused from there...I figure I'll have to get the 's' on one side right? separable? Am I even on the right track here? Just starting out in the class.