document.write( "Question 355160: if a penny is put into a savings account on day one and 2 pennies on day two and so forth until day 100, how much money would be there on day 100? what is the equation for this?
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Algebra.Com's Answer #253706 by ewatrrr(24785)\"\" \"About 
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Hi,
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\n" ); document.write( "*Note: this method of savings describes an arithmetic sequence:
\n" ); document.write( "{1,2,3,..100}
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\n" ); document.write( "Sum of n terms of an arithmetic sequence is:
\n" ); document.write( "\"S%5Bn%5D=+%28n%28a%5B1%5D%2Ba%5Bn%5D%29%29%2F2\"
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\n" ); document.write( "\"S%5B100%5D=+%28100%281+%2B+100%29%29%2F2+=+50%2A101\"
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\n" ); document.write( "50*101 = 5050 pennies
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\n" ); document.write( "$50.50
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