document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=213056>Question 213056</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A grocer makes a display of cans in which the top row has one can and each lower row has two more cans than the last row. If the display has 100 cans, how many rows does it contain? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #160945 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=160945\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A grocer makes a display of cans in which the top row has one can and each lower row has two more cans than the last row. If the display has 100 cans, how many rows does it contain?<BR>\n" );
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document.write( "It's an arithmetic sequence: 1,3,5,7,...,2n-1<BR>\n" );
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document.write( "S(n) = (n/2)(1 + 2n-1] = 100<BR>\n" );
document.write( "n[1 + 2n-1] = 200<BR>\n" );
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document.write( "n[2n] = 200<BR>\n" );
document.write( "2n^2 = 200<BR>\n" );
document.write( "n^2 = 100<BR>\n" );
document.write( "n = 10 (# of rows)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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