Question 1146380
A model rocket is blasted off from the ground into the air and fall back to the ground. Its height, h, in meters is approximated by the function h (t) = -4.9t ^2 + 15t +2, where t is the time in seconds.

From what height is the rocket blasted off?
h(t) = -4.9t^2 + 15t + 2
It's h(0).  Sub 0 for t.
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When is the rocket on the ground?
When it's launched, and at impact.
IOW, when h(t) = 0
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When does the rocket reach its max height, and what is the max height?
t for max height is the vertex of the parabola, at 
t = -b/2a
Find t, then find h(t)