document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=214875>Question 214875</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car leaves Oak Corners at 11:30 AM traveling south at 60 mph. At the same time, another car is 50 miles west of Oak Corners traveling east at 40 mph. Express the distance d between the cars as a function of the time t after the first car left Oak Corners. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #162372 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=162372\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A car leaves Oak Corners at 11:30 AM traveling south at 60 mph. At the same time, another car is 50 miles west of Oak Corners traveling east at 40 mph. Express the distance d between the cars as a function of the time t after the first car left Oak Corners.<BR>\n" );
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document.write( "It's not clear which is the \"1st car\", but starting from the time one car is 50 miles west (1130):<BR>\n" );
document.write( "d^2 = (50 - 40t)^2 + (60t)^2<BR>\n" );
document.write( "d^2 = 2500 - 4000t + 1600t^2 + 3600t^2<BR>\n" );
document.write( "d^2 = 5200t^2 - 4000t + 2500<BR>\n" );
document.write( "d(t) = 10sqrt(52t^2 - 40t + 25) t in hours, d in miles<BR>\n" );
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