document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=630566>Question 630566</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a car traveled 80 miles between 2pm and 4pm. Is it true thst there must have been a time which its instantaneous speed was exactly 40 miles per hour? Justify your answer with an appropriate theorem or a counterexample if false.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #397002 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=397002\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a car traveled 80 miles between 2pm and 4pm. Is it true thst there must have been a time which its instantaneous speed was exactly 40 miles per hour? Justify your answer with an appropriate theorem or a counterexample if false. <BR>\n" );
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document.write( "His average speed was 40.  <BR>\n" );
document.write( "Either he maintained 40 for 2 hours,<BR>\n" );
document.write( "or he went slower for a time, then faster<BR>\n" );
document.write( "for a time.<BR>\n" );
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document.write( "In either case there was an instant when his<BR>\n" );
document.write( "speed was 40 mph.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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