document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28570>Question 28570</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This word problem has got me stumped.  Any help you can provide would be appreciated.  <BR>\n" );
document.write( "The percent of deaths caused by smoking is modeled by the rational funtion defined by: P(X)=X-1/X<BR>\n" );
document.write( "where x is the number of times a smoker is more likely to die of lung cancer than a nonsmoker.  x is equal to 10.\r<BR>\n" );
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document.write( "Please help me find:<BR>\n" );
document.write( "a. p(x) if x is 10<BR>\n" );
document.write( "b. For what values of x is p(x) = 80%<BR>\n" );
document.write( "c. Can the incidence rate equal zero, explain.\r<BR>\n" );
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document.write( "I know this is asking alot, but I have been over this several times, and can't even figure out where to begin.\r<BR>\n" );
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document.write( "Thanks!\r<BR>\n" );
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document.write( "Lisa </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15575 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15575\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This word problem has got me stumped. Any help you can provide would be appreciated. <BR>\n" );
document.write( "The percent of deaths caused by smoking is modeled by the rational funtion defined by: P(X)=X-1/X...HOPE YOU ARE CORRECT IN TYPING..AS TYPED THIS MEANS <BR>\n" );
document.write( "...X-(1/X)....IF BRACKETS ARE NOT PUT PROPERLY IT COULD MEAN (X-1)/X.I AM TAKING IT AS X-(1/X)<BR>\n" );
document.write( "where x is the number of times a smoker is more likely to die of lung cancer than a nonsmoker. x is equal to 10. <BR>\n" );
document.write( "Please help me find:<BR>\n" );
document.write( "a. p(x) if x is 10<BR>\n" );
document.write( "JUST PUT 10 IN PLACE OF X IN THE GIVEN FUNCTION OF P(X) TO GET THE ANSWER.<BR>\n" );
document.write( "P(X)=X-1/X =10-1/10=(10*10-1)/10 = (100-1)/10 =99/10\r<BR>\n" );
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document.write( "b. For what values of x is p(x) = 80%<BR>\n" );
document.write( "HERE PUT P9x0 IN THE GIVEN FUNCTION AND FIND X<BR>\n" );
document.write( "P(X)=X-1/X  =80% = 80/100=8/10=4/5<BR>\n" );
document.write( "(X*X-1)/X=4/5..CROSS MULTIPLYING..<BR>\n" );
document.write( "5X^2-5=4X<BR>\n" );
document.write( "5X^2-4X-5=0<BR>\n" );
document.write( "THE ANSWER IS OBTAINED USING QUADRATIC EQUATION FORMULA<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "X={4+SQRT(116)}/10...OR....={4-SQRT(116)}/10...\r<BR>\n" );
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document.write( "c. Can the incidence rate equal zero, explain. <BR>\n" );
document.write( "YOU MEAN CAN P(X) BE ZERO?? IS THE QUESTION..\r<BR>\n" );
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document.write( "P(X)=X-1/X  =0% <BR>\n" );
document.write( "(X*X-1)/X=0..CROSS MULTIPLYING..<BR>\n" );
document.write( "X^2-1=0<BR>\n" );
document.write( "X^2 = 1<BR>\n" );
document.write( "X=1 OR -1...SO MATHEMATICALLY IT IS POSSIBLE .BUT THE FEASIBILITY OF X TAKING THAT VALUE IN REALITY SAY -1 IS IMPOSSIBLE AND EVEN +1 IS DEBATABLE.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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