document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=839942>Question 839942</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat takes 8 hours to go 6 miles upstream and come back to the starting point. If the speed of the boat is 4 miles per hour in still water, what is the rate of the current?<BR>\n" );
document.write( "Hint: total time taken = time taken to go upstream + time taken to go downstream </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #505890 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=505890\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What is the speed of the water current?  <BR>\n" );
document.write( "Let c = the speed of the current.\r<BR>\n" );
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document.write( "________________speed_____________time___________distance<BR>\n" );
document.write( "UP______________4-c_______________(___)__________6<BR>\n" );
document.write( "DOWN____________4+c_______________(___)__________6<BR>\n" );
document.write( "TOTAL______________________________8\r<BR>\n" );
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document.write( "Uniform rates travel, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%2AT=D ALIGN=MIDDLE  ALT=\"R%2AT=D\"   DISABLED_style= \"max-width:90%; height:auto;\" >, R for rate, T for time, D for distance.  Use that to find the time expressions. \r<BR>\n" );
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document.write( "________________speed_____________time___________distance<BR>\n" );
document.write( "UP______________4-c_______________6/(4-c)__________6<BR>\n" );
document.write( "DOWN____________4+c_______________6/(4+c)__________6<BR>\n" );
document.write( "TOTAL______________________________8\r<BR>\n" );
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document.write( "Solve this equation for c:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%286%2F%284-c%29%2B6%2F%284%2Bc%29=8%29 ALIGN=MIDDLE  ALT=\"highlight%286%2F%284-c%29%2B6%2F%284%2Bc%29=8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
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