document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1143407>Question 1143407</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose a railroad rail is 4 kilometers and it expands on a hot day by 13 centimeters in length. Approximately how many meters would the center of the rail rise above the​ ground?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #764217 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=764217\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose a railroad rail is 4 kilometers and it expands on a hot day by 13 centimeters in length.<BR>\n" );
document.write( " Approximately how many meters would the center of the rail rise above the​ ground? <BR>\n" );
document.write( ":<BR>\n" );
document.write( "change 4 km to 4000 meters, change 13 cm to .13 meters<BR>\n" );
document.write( "this would form an isosceles triangle with a base of 4000 meters<BR>\n" );
document.write( "then<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284000%2B.13%29%2F2 ALIGN=MIDDLE  ALT=\"%284000%2B.13%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 2000.065 meters, the equal sides<BR>\n" );
document.write( "the altitude (a) of the triangle = the center of the rail rise<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Using pythag on one of the two right triangles that are formed<BR>\n" );
document.write( "a^2 + 2000^2 = 2000.065^2<BR>\n" );
document.write( ":<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%282000.065%5E2+-+2000%5E2%29 ALIGN=MIDDLE  ALT=\"sqrt%282000.065%5E2+-+2000%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = 16 meters approximately<BR>\n" );
document.write( "  </SPAN>\n" );
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