Q21:
An object throwndirectly upward is at a height of h feet after t seconds, where h = -16 (t - 3)2 + 150. At what height, in feet, is the object 2 seconds after it reaches itsmaximum height?
A. 6
B. 86
C. 134
D 150
E. 214
举报
t=3时reaches its maximum height
本题求的是t=5时h等于多少,代入就能得到答案
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