Q:

During batting practice, two pop flies are hit from the same location, 2 s apart. The paths are modeled by the equations h = -16t2 + 56t and h = -16t2 + 156t - 248, where t is the time that has passed since the first ball was hit.Explain how to find the height at which the balls meet. Then find the height to the nearest tenth.

Accepted Solution

A:
9514 1404 393Answer:   40.5 ftStep-by-step explanation:Solve for the time at which the balls meet, then find the corresponding height.__The balls will meet at the height such that the two values of h are the same.   -16t^2 +56t = h = -16t^2 +156t -248   0 = 100t -248   t = 2.48Using the first equation to find h, we have ...   h = t(-16t +56) = 2.48(-16·2.48 +56) = 40.4736The balls meet at a height of about 40.5 feet.