[問題]GWD26-21

[magic]

Q21:
An object thrown directly 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 its maximum height?

A. 6
B. 86
C. 134
D 150
E. 214
答案是B
這提要怎麼算阿??

[lance921]

他問到最高點後 再過兩秒
依照公式 最高點應該在3秒 所以他是問五秒後的高度
把五代進去 就求出來了