please help me!! :(

Question

On a windy morning, a hot air balloon starts rising and flying away from the top of a hill. The altitude, h, in feet, of the balloon x hours after starting its ascent from the hill, can be modeled by this function:

h(x) = –16x2 + 64x + 80.

What is the maximum height, in feet, that the balloon will reach?

Answer 1

The balloon reaches its maximum height in 2 minutes (see solution to your other post)

h(2) = 144.