Question

A football is kicked into the air. Its height above the ground is approximated by the equation h=20t-5
`t^(2)`, where h is the height in meters and t is the time in seconds since the football was kicked.

a)what are the zeros of the relation? when does the football hit the ground?

Answer 1

Zeroes - x=0 and x=4

Football hits the ground at x=4 (4 seconds)

Explanation:

1) Plug equation in graphing calculator and graph function.

2) Find zeroes

3) The second zero is when the football hits the ground