[求助]请教一道数学题

huangxiaoyan

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?

Answer:86

mymengming

h= -16 (t-3)²+ 150
从公式可以看出，t=3的时候是达到最高点，h=150
然后再过两秒也就是t=5的时候
h=150-16×（5-3）²⁼⁸⁶

huangxiaoyan

谢谢

babysjl

correct