Question: The function S(t) = -16t2 + 64t + 192 gives the height S, in feet, of a model rocket launched with a velocity of 64

The function S(t) = -16t2 + 64t + 192 gives the height S, in feet, of a model rocket launched with a velocity of 64 ft/sec from a hill that is 192 ft high.
a) Determine how long it will take the rocket to reach the ground.
b) Find the interval on which the height of the rocket is greater than 240 ft.

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