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 starting height of the balloon?

Answer 1

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 starting height of the balloon?

As Height of balloon is

h(x) = –16x2 + 64x + 80.

where x = time in hours , h= height at x hour

plug in x = 0 for starting time

h(0) = -16*0 +64*0 +80

= 80

So starting height of balloon is 80 ft