Answer:
1)27.25 feet
2)-0.2774,2.027
3)Domain = All real numbers
Range = y∈R :

Explanation:
The height of the football, h, at time t seconds is modeled by the equation

General quadratic equation :

1) Maximum height will be at

To find maximum height Substitute
in the given equation

2)
Substitute h(t)=6
So,


3)
Domain = All real numbers
Range = y∈R :
