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March 31, 2015

March 31, 2015

Posted by **Mary18** on Saturday, April 14, 2012 at 7:27pm.

A football player punts a ball. The path of the ball can be modeled by the equation y = -0.004x^2 + x +2.5, where x is the horizontal distance, in feet, the ball travels and y is the height in feet, of the ball. How far from the football player will the ball land? Round to the nearest tenth of a foot.

- math -
**Reiny**, Saturday, April 14, 2012 at 8:52pmHere is a graph showing the path of the ball

http://www.wolframalpha.com/input/?i=0%3D+-0.004x%5E2+%2B+x+%2B2.5

So the x-intercept would be the distance covered

so -0.004x^2 + x +2.5 = 0

use the quadratice equation were

a = -.004, b = 1, and c = 2.5

x = (-1 ± √1.04)/-.008

= appr. 252.8 or a negative

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