document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=200494>Question 200494</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780073533490/algebrahomeworkh>Elementary and Intermediate Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Avoiding a collision. A car is traveling on a road that<BR>\n" );
document.write( "is perpendicular to a railroad track. When the car is<BR>\n" );
document.write( "30 meters from the crossing, the car’s new collision<BR>\n" );
document.write( "detector warns the driver that there is a train 50 meters<BR>\n" );
document.write( "from the car and heading toward the same crossing. How<BR>\n" );
document.write( "far is the train from the crossing? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #150734 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=150734\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Avoiding a collision. A car is traveling on a road that<BR>\n" );
document.write( "is perpendicular to a railroad track. When the car is<BR>\n" );
document.write( "30 meters from the crossing, the car’s new collision<BR>\n" );
document.write( "detector warns the driver that there is a train 50 meters<BR>\n" );
document.write( "from the car and heading toward the same crossing. How<BR>\n" );
document.write( "far is the train from the crossing?<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Applying Pythagorean theorem:<BR>\n" );
document.write( "Let x = train's distance from crossing<BR>\n" );
document.write( "then<BR>\n" );
document.write( "x^2 + 30^2 = 50^2<BR>\n" );
document.write( "x^2 = 50^2 - 30^2<BR>\n" );
document.write( "x^2 = 2500 - 900<BR>\n" );
document.write( "x^2 = 1600<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%281600%29 ALIGN=MIDDLE  ALT=\"sqrt%281600%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 40 meters<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );