document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1091343>Question 1091343</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Imagine you start saving pennies during summer vacation. On the first day, drop one penny into the piggy bank, two pennies the second day, three pennies the third day, and so on. How much money do you have at the end of summer? Vacation this year lasts 75 days.\r<BR>\n" );
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document.write( "I would like to know if there is a formula for doing this, since I know that adding each time one by one would take forever. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #705722 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=705722\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The formula is (1/2)(n)(n+1)<BR>\n" );
document.write( "=(1/2)(75*76)=(1/2)(5700)=$28.50 </SPAN>\n" );
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