Quadratic formula, Mr. Kirkland, 10-16-13
We are going to solve this cannonball equation by using the Quadratic Formula. We use the Quadratic Formula to find the x-intercepts.
If a cannon is fired from 7 feet off the ground and the flight path is modeled by y=-16t^2+85t+7, how long does it take for the cannonball to hit the ground?
-16t^2+85+7 A=-16 B=85 C=7