document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=330237>Question 330237</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please walk me through this?\r<BR>\n" );
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document.write( "Plastic pipe is stacked so that the bottom row has 25 pipes, the next row has 24 pipes, the next row has 23 pipes, and so on until there is 1 pipe at the top of the stack. If a worker removes the top 17 rows of pipe, how many pieces of pipe will be left in the stack?<BR>\n" );
document.write( "___ pieces of pipe \r<BR>\n" );
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document.write( "Thank you,<BR>\n" );
document.write( "Edgar </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236677 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=236677\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Can someone please walk me through this? <BR>\n" );
document.write( "Plastic pipe is stacked so that the bottom row has 25 pipes, the next row has 24 pipes, the next row has 23 pipes, and so on until there is 1 pipe at the top of the stack. If a worker removes the top 17 rows of pipe, how many pieces of pipe will be left in the stack?<BR>\n" );
document.write( "___ pieces of pipe <BR>\n" );
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document.write( "The total number of pipes is 1+2+3+...+23+24+25<BR>\n" );
document.write( "= (25/2)(1+25) = 325<BR>\n" );
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document.write( "The top 17 rows have 1+2+3+4...+15+16+17<BR>\n" );
document.write( "= (17/2)(1+17) = 153<BR>\n" );
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document.write( "You can figure out how many are left after removing 153 of the pipes.<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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