Open Question: can someone help me please :(?

A golfer attempts to hit a golf ball over a gorge from a platform over the ground. The function that models the height of the ball is h(t)=-5t2+40t+100, where h(t) is the height in meters at time t seconds after contact. There are power lines 185m over notice: there is a - beside the 5 after the h(t)=

17 Mar 2010, 4:52 pm | click here to view more