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February 1, 2015

February 1, 2015

Posted by **Joe** on Thursday, April 15, 2010 at 6:21pm.

a) how long after it is kicked is the soccer ball at a height of 30 m ?

b) How long is the soccer ball in the air?

- math -
**MathMate**, Thursday, April 15, 2010 at 7:03pma)h=30, solve for t

30=-5t^2+25t

5(t^2-5t+6)=0

5(t-3)(t-2)=0

t=2 (ball going up) or

t=3 (ball going down)

b) h=0, solve for t

0=-5t^2+25t

5t(5-t)=0

t=0 or t=5

Make similar interpretations.

- math -
**tali**, Thursday, February 28, 2013 at 9:13amdde

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