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August 22, 2014

August 22, 2014

Posted by **Anonymous** on Sunday, March 14, 2010 at 8:49pm.

- math -
**Reiny**, Sunday, March 14, 2010 at 11:53pmYour equation does not make sense, things would be falling upwards

I think it should be

s(t) = -16t^2 + 64t + 192

we want 0 = -16t^2 + 64t + 192

t^2 - t - 12 = 0

(t-4)(t+3) = 0

t = 4 or t = -3 , but t > 0

so t = 4 seconds

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