# Quadratic Formula

### Cayla Edwards Kirkland October 16, 2013

If a cannon is fired from a height of 9.8 meters above the ground, at a certain angle, the height of the cannonball above the ground, h, in meters, at time t, in seconds, is found by the function s(t)=-4.9t^2+33.5t+9.8. Find the time for the cannonball to strike the ground.

Plug in your A,B,C. A=-4.9 B=33.5 C=9.8

Since time cannot be negative, the cannon ball will hit the ground at 7.12 seconds.