document.write( "Question 967979: If a person puts 1 cent in a piggy bank on the first day, 2 cents on the second day, 3 cents on the third day and so on, how much money will be in the bank after 40 days?\r
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Algebra.Com's Answer #591604 by macston(5194)\"\" \"About 
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= n(n+1)/2
\n" ); document.write( "=(40 x 41)/2
\n" ); document.write( "=820 cents
\n" ); document.write( "=$8.20
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