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April 18, 2015

April 18, 2015

Posted by **tommy** on Wednesday, June 3, 2009 at 11:22pm.

- math problem -
**Reiny**, Wednesday, June 3, 2009 at 11:36pmsum = 1+2+4+8+16+ ...

= 2^0 + 2^1 + 2^2 + 2^3 + ... 2^30

this is a geometric series

= a(r^n - 1)/(r-1)

= 2(2^30 - 1)/(2-1)

= 2 147 483 646 pennies

= $ 21 474 836.46

(check my arithmetic)

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