document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1049061>Question 1049061</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 1860 and 1861, riders of the Pony Express delivered mail on horseback from<BR>\n" );
document.write( "St. Joseph, Missouri, to Sacramento, California. The trip of 1966 miles took<BR>\n" );
document.write( "about 10 days (240 hours).<BR>\n" );
document.write( " a. What was the riders’ average speed to the nearest tenth of a mile per hour?<BR>\n" );
document.write( " b. A student estimates that it would take a Pony Express rider less than<BR>\n" );
document.write( "6 hours to travel 75 miles. Is the student’s estimate reasonable? Explain\r<BR>\n" );
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document.write( "Make a proportion out of this. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #664609 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=664609\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  In 1860 and 1861, riders of the Pony Express delivered mail on horseback from<BR>\n" );
document.write( "St. Joseph, Missouri, to Sacramento, California.<BR>\n" );
document.write( " The trip of 1966 miles took about 10 days (240 hours).<BR>\n" );
document.write( ":<BR>\n" );
document.write( "a. What was the riders’ average speed to the nearest tenth of a mile per hour?<BR>\n" );
document.write( "speed = dist/time<BR>\n" );
document.write( "s = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1966%2F240 ALIGN=MIDDLE  ALT=\"1966%2F240\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "s = 8.2 mph<BR>\n" );
document.write( ":<BR>\n" );
document.write( "b. A student estimates that it would take a Pony Express rider less than<BR>\n" );
document.write( "6 hours to travel 75 miles.<BR>\n" );
document.write( " Is the student’s estimate reasonable? Explain<BR>\n" );
document.write( "Make a proportion out of this. <BR>\n" );
document.write( "let t = actual time to go 75 mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F240 ALIGN=MIDDLE  ALT=\"t%2F240\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=75%2F1966 ALIGN=MIDDLE  ALT=\"75%2F1966\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "cross multiply<BR>\n" );
document.write( "1966t = 240 * 75<BR>\n" );
document.write( "t = 18000/1966<BR>\n" );
document.write( "t = 9.15 hrs to go 75 mi<BR>\n" );
document.write( ":<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Check: 8.2 * 9.15 = 75 mi </SPAN>\n" );
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