document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=757175>Question 757175</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, can you show me how to solve the following word problem using linear equations?  In 2009, the population was 6.8 billion.  It is estimated that the annual growth rate is 0.07 billion.  Assuming that the growth rate stays the same, in what year will the population reach 8.5 billion? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #460679 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</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=460679\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The sense best found is that this is arithmetic progression.\r<BR>\n" );
document.write( "\n" );
document.write( "YEAR_______0 is year 2009__________POPULATION(Billions)<BR>\n" );
document.write( "2009_______0__________6.8<BR>\n" );
document.write( "2010_______1__________<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6.8%2B0.07 ALIGN=MIDDLE  ALT=\"6.8%2B0.07\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2011_______2__________<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6.8%2B0.07%2B0.07 ALIGN=MIDDLE  ALT=\"6.8%2B0.07%2B0.07\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(???)______n__________<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6.8%2B0.07n ALIGN=MIDDLE  ALT=\"6.8%2B0.07n\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "What is n when the population is 8.5 billion?  Then the year is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2009%2Bn ALIGN=MIDDLE  ALT=\"2009%2Bn\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6.8%2B%280.07%29n=8.5 ALIGN=MIDDLE  ALT=\"6.8%2B%280.07%29n=8.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Find n. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );