Homework Help: algebra

Posted by tenzing on Wednesday, May 18, 2011 at 7:51pm.

during pratice a softball pitcher throws a ball whose height can be modeled by the equation h=-16tsquared+24t+1 where h=height in feet and t=time in seconds. how lond does it take for the ball to reach a height of 6 feet?

algebra - Henry, Thursday, May 19, 2011 at 10:38pm
h = -16t^2 + 24t + 1 = 6.
-16t^2 + 24t - 5 = 0,
Solve for t using the Quadratic Formula
and get:

t = 0.25 and 1.25s.

We have 2 positive solutions for which
I have no explanation.

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