If you would begin in a penny & double it everyday for 30 days. one penny would turn into $5,368,709.12. Wow!
http://www.kgbanswers.com/ifapennyisdoubledev...

If you have 1 penny at the first day the doubles in second day ,the after 30 days 2^29=536,870,912 pennies.If starts doubling in first day answer is 2^30=1,073,741,824 pennies.I think
http://www.webanswers.com/science/math/howmuchmo...

$10,737,418.23. I was a little confused by the wording. that's the total for the 30th day. However, your question said "after" 30 days, which may mean the 31st day. In that
http://answers.yahoo.com/question/index?qid=200612...
