Question 971832
A football is punted from a height of 2.5 feet above the ground with an initial vertical velocity of 45 feet per second.

Write an equation to model the height h in feet of the ball t seconds after it has been punted.
---
32 ft/sec/sec is often used for gravity on Earth
--> h(t) = -16t^2 + 45t + 2.5
----------------
The football is caught at 5.5 feet above the ground. How long was the football in the air?
h(t) = -16t^2 + 45t + 2.5 = 5.5
-16t^2 + 45t - 3 = 0
*[invoke solve_quadratic_equation -16,45,-3]
================
t =~ 0.068 seconds ascending thru 5.5 ft
t =~ 2.744 seconds when caught