document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=123004>Question 123004</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having some difficulty in solving rational expressions.  If someone could please explain to me on how to solve when in a word problem.. any help would be greatly appreciated....\r<BR>\n" );
document.write( "\n" );
document.write( "1.	The cost, in millions of dollars, to remove x % of pollution in a lake modeled by  C=6000/200-2x<BR>\n" );
document.write( "a.	What is the cost to remove 75% of the pollutant?<BR>\n" );
document.write( "b.	What is the cost to remove 90 % of the pollutant?<BR>\n" );
document.write( "c.	What is the cost to remove 99% of the pollutant?<BR>\n" );
document.write( "d.	For what value is this equation undefined?\r<BR>\n" );
document.write( "\n" );
document.write( "This is not from a textbook...\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #90267 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=90267\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> C=6000/(200-2X) I'LL ASSUME THIS IS THE EQUATION.<BR>\n" );
document.write( "C=6000/(200-2*75)<BR>\n" );
document.write( "C=6000/(200-150)<BR>\n" );
document.write( "C=6000/50<BR>\n" );
document.write( "C=120 COST TO REMOVE 75%.<BR>\n" );
document.write( "C=6000/(200-2*90)<BR>\n" );
document.write( "C=6000/(200-180)<BR>\n" );
document.write( "C=6000/20<BR>\n" );
document.write( "C=300 COST TO REMOVE 90%.<BR>\n" );
document.write( "C=6000/(200-2*99)<BR>\n" );
document.write( "C=6000/(200-198)<BR>\n" );
document.write( "C=6000/2<BR>\n" );
document.write( "C=3000 COST TO REMOVE 99%.<BR>\n" );
document.write( "THE EQUATION IS UNDEFINED WHEN YOU USE 100%.<BR>\n" );
document.write( "C=6000/(200-200)<BR>\n" );
document.write( "C=6000/0 C BECOMES UNDEFINED WHEN YOU IVIDE BY 0.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );