Consider a storage tank containing Vo liters of pure water. Water containing salt at a concentration of co kg/liter enters the tank at a rate r liters/min. The well-mixed solution leaves the tank at...

Extracted text: Consider a storage tank containing Vo liters of pure water. Water containing salt at a concentration of co kg/liter enters the tank at a rate r liters/min. The well-mixed solution leaves the tank at the same rate. Write down an initial value problem for the amount A(t) of salt in the tank at time t. You do NOT need to solve.