Question

Nathan is playing golf at a golf course. The height of the golf ball from the ground, in feet, x seconds after the ball is hit is given by the expression below.

What do the zeros of the expression represent?

A.
the times at which the golf ball is on the ground
B.
the times at which the golf ball reaches the maximum height
C.
the maximum height of the golf ball in the air
D.
the horizontal distance traveled by the golf ball

Answer 1

A. the times at which the golf ball is on the ground

Explanation:

The expression of the function is

h(x)= -4x^2+36x

The roots can be seen in the image below

You have a formula which represents the height over time.

The roots of the equation indicate that the height is equal to zero

The correct option is

A. the times at which the golf ball is on the ground

The ball is in the ground at x= 0 and x = 9 seconds