the question says " when did the rock reach half its maximum height?
a rock is thrown vertically upward from the surface of the moon at a velocity of 24m/sec and
reaches height of s= 24t-0.8t^2
The Attempt at a Solution
i figured out when the rock reaches max point which is 15 seconds. i think when velocity = zero is when you can figure out the max height. i don't know about half of max height.