The air in a small room 12 ft by 8 ft by 8 ft is 3% carbon monoxide. Starting at t=0, fresh air containing no carbon monoxide is blown into the room at a rate of 100ft3min. If air flows out of the room through a vent at the same rate, when will the air in the room be 0.01% carbon monoxide? First find the function that describes how the volume of CO in the room x(t) varies with time