SOMEONE PLEASE HELP ME IM GONNA FAIL 
 The wind force F on a sail varies jointly as the area A of the sail and the square of the wind speed w.
 The force on a sail with area an area of 500 P? is 64.8 pounds when the wind speed is 18 mph. What
 would be the force for a sail with an area of 250 f2 with a wind speed of 35 mph.