When concentrations of formaldehyde in the air exceed 33 g/ft (1 g = 1 microgram = 106 gram), a strong odor and irritation to the eyes often occurs. One square foot of hardwood plywood paneling can emit 3365 g of formaldehyde per day. A 4 ft by 9 ft sheet of paneling is attached to a wall in a room having floor dimensions of 10 ft by 10 ft and height of 9 ft. (a) The total area of hardwood plywood paneling is 36 ft2. If there is no ventilation in the room, write a linear equation that models the amount of formaldehyde F in the room after x days. F= (Simplify your answer.)