Solve the problem.If a rock is thrown vertically upward from the top of a building 80 feet high with an initial velocity of 64 feet per second, the height, h, above ground level after t seconds is given by h = -16t2 + 64t + 80, where h is in feet and t is in seconds. What is the maximum height the rock will reach?
A. 80 ft.
B. 144 ft.
C. 16 ft.
D. 84 ft.
Answer: B
Mathematics
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B. 0.3 in.
C. 0.1 in.
D. 0.2 in.
a 4
in. b 
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in. d 
in. e 2
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