document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=976287>Question 976287</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One person left at 9:00am  and drove north at 60 miles per hr.  Another person left the same rest stop and an hour later and headed south  at 50 mph. What time were they 335 miles apart ?<BR>\n" );
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document.write( "Let t be the number of hours after 9 am.<br><BR>\n" );
document.write( "The distance between the two people is changing at the rate of 60 miles each hour for 1 hour.<br><BR>\n" );
document.write( "The distance between them is changing at the rate of (60+50) = 110 miles each hour for (t-1) hours.<br><BR>\n" );
document.write( "The total distance between them after t hours is 335 miles.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%2B110%28t-1%29=335 ALIGN=MIDDLE  ALT=\"60%2B110%28t-1%29=335\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%2B110t-110=335 ALIGN=MIDDLE  ALT=\"60%2B110t-110=335\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=110t=385 ALIGN=MIDDLE  ALT=\"110t=385\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=385%2F110=3.5 ALIGN=MIDDLE  ALT=\"t=385%2F110=3.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The time when the two people are 335 miles apart is 3.5 hours after 9 am, which is 12:30 pm.<br><BR>\n" );
document.write( "ANSWER: 12:30 pm<br><BR>\n" );
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