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April 21, 2014

April 21, 2014

Posted by **Melissa** on Saturday, December 17, 2011 at 12:50am.

- math -
**Steve**, Saturday, December 17, 2011 at 6:15amThis is just finding the sum of the sum of the series

-3 + 6*.6 + 6*.6*.6 + ...

We subtract off the 3 because the ball didn't start from the ground, so its first hop is only the downward part.

a = 6

r = 0.6

S5 = 6 (1-.6^5)/(1-.6)

= 6(2.3056) = 13.8336

S5 - 3 = 10.8336

Check: 3 + 3.6 + 2.16 + 1.296 + 0.7776 = 10.8336

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