document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=29461>Question 29461</A>: <I><SPAN STYLE=\"word-break: break-all;\"> After tx years, the number of units of a product sold per year is given by q=170*0.4^0.8t After how many years will the number of units sold per year be 130?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #16257 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=16257\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 130=170*(.4^0.8t)<BR>\n" );
document.write( "130/170 = (.4^0.8t)...<BR>\n" );
document.write( "0.8T*LN(0.4)=LN(0.764706)<BR>\n" );
document.write( "0.8T=LN (0.764706)/LN(0.4)=-0.26826/-0.91629=0.292772<BR>\n" );
document.write( "T=0.292772/0.8=0.365964.......IS THE ANSWER... </SPAN>\n" );
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