Vertical motion problem (11-13); chuck stone is standing atop a high platform. he fires a rock up
into the air with his slingshot. while it is in flight, the rock's distance above the ground is a
quadratic function of time. at times 1, 2, and 3 seconds after he fired it, the rock is 68, 96, and
114 meters above the ground, respectively. this shows that the graph of the quadratic function
includes the points:
(1,68) (2,96) (3,114)
11. write the particular equation for the rock's distance above the ground (d) as a function of
time (t).
12. what is the highest the rock will be above the ground?
13. how high is the platform? (the rock is at the platform level when t = 0.)