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July 23, 2014

July 23, 2014

Posted by **Medusa.** on Thursday, September 6, 2012 at 1:46pm.

- Math -
**Henry**, Friday, September 7, 2012 at 10:48pmThe 16t should be 16t^2. Check your Eq for errors.

d = 64t +16t^2 = 80

16t^2 + 64t - 80 = 0

(T-1)(T+5) = 0.

T = 1, and -s.

T = 1 s.

- Math -
**Henry**, Friday, September 7, 2012 at 10:58pmCorrection:

16t^2 + 64t - 80 = 0

Divide both side by 16:

t^2 + 4t - 5 = 0.

(T-1)(t+5) = 0

T = 1, and -5.

Use positive value of T.

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