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A Stone Is Thrown Upward from the Top of a Cliff

Question 312

Multiple Choice

A stone is thrown upward from the top of a cliff, which is 864 feet high, with an initial velocity of 48 feet per second. Neglecting air resistance, the height h(t) of the stone after t seconds is given by h(t) = -16t2 + 48t + 864.
-When will the stone hit the ground?


A) 10 sec
B) 9 sec
C) 6 sec
D) 4 sec

Correct Answer:

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