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March 3, 2015

March 3, 2015

Posted by **Lynn** on Friday, November 18, 2011 at 12:32am.

I know that the formula is h=-16t^2+v0t+h0

The only thing I know what to do is...

10=-16t^2-55 ? ?

- Math -
**Reiny**, Friday, November 18, 2011 at 8:32amYour formula would be

h = -16t^2 - 55t + 10

when it hits the ground h = 0

16t^2 + 55t - 10 = 0

t = (-55 ± √3665)/32 = .173 seconds or a negataive

- Math -
**David**, Friday, February 6, 2015 at 1:21am10ft

- Math -
**David**, Friday, February 6, 2015 at 1:26amset up as a quadratic then solve for t

0=(8.98)t^2+55t-10

t=0.1767 seconds

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