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September 30, 2014

September 30, 2014

Posted by **carol** on Monday, May 2, 2011 at 11:18am.

- math -
**Henry**, Tuesday, May 3, 2011 at 7:57pmWhen the stone hits the , the heiht will be zero:

-9.8t^2 - 10t + 250 = 0,

Solve using the Quadratic Formula and

get:

t = -5.59 and 4.57s.

Use positve value:

t = 4.57s.

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