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September 23, 2014

September 23, 2014

Posted by **sally** on Sunday, October 30, 2011 at 10:30pm.

- Math (logic and problem solving) -
**bobpursley**, Sunday, October 30, 2011 at 10:37pmheight: 16;8;4;2;1

fourth bounce. Distance went 16+2*8+2*4+2*2+1

or another way:

Distance=16+ 16(.5)+16*.5^2+ 16*.5^3+1

this looks like a geometric series, r=.5

So in a geometric series,

an= A_{1}*r^n n=0, 1, 2,..

to find our problem

1=16 (.5)^n

1/16= (1/2)^n

take log base 1/2 of each side..

4=n

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