A small pond outside of a chemical factory catches runoff from the processes inside. It initially has 800 gallons of water with 2 ounces of pollution dissolved in the water. Polluted water flows into the pond at a rate of 3 gallons an hour and contains 5 ounces a gallon of pollution. The polluted water is well-mixed, and the well-mixed solution leaves the pond at 3 gallons an hour, as well. Determine the amount of pollution in the pond at any time t. As t , how much pollution will remain in the pond?