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December 22, 2014

December 22, 2014

Posted by **Taina** on Monday, June 20, 2011 at 9:11pm.

- math -
**Reiny**, Monday, June 20, 2011 at 9:45pmset

0 = -9.8t^2 - 10t + 210

use the quadratic formula, where

a = -9.8

b = -10

c = 210

I got 4.14 seconds

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