SOLUTION: If you take 1 penny and double it each day for 31 days. How much money will you have? Express in $.

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Question 729333: If you take 1 penny and double it each day for 31 days. How much money will you have? Express in $.
Found 2 solutions by lynnlo, ikleyn:
Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
$21,474,836.48

Answer by ikleyn(53538) About Me  (Show Source):
You can put this solution on YOUR website!
.
If you take 1 penny and double it each day for 31 days.
How much money will you have? Express in $.
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        The other person gave the answer  2147483648  in his post.

        Without making any calculations, I see and I am convinced that his answer is  INCORRECT.

        How do I know it ?


Very simple.  The answer is the sum

    1 + 2 + 4 + 8 + . . . + 2%5E30 = 2%5E31 - 1.


It is an odd number, while the other person provides an even number.


The  highlight%28highlight%28true%29%29  answer is  highlight%28highlight%282147483647%29%29  cents, or  21,474,836.47 dollars.

Solved correctly.