A tank holds 2,700 gallons of water, which drains from the bottom of a tank in 50 minutes. The rate at which the volume of water is draing from a tank is after t minutes is given by the formula t V'(t) = 108(1 E) for0 g t S 50 (a) Find the total amount of water that has drained from the tank in the first 15 minutes. gallons (b) How long will it take for 2,200 gallons of water to drain from the tank? In minutes