document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=115033>Question 115033</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help solving this word problem:<BR>\n" );
document.write( " The debt on a certain credit card follows the function d=9000*1.015^t where d = debt in $ and t= time in months.\r<BR>\n" );
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document.write( "A)How much debt will be owed in t=6 months?<BR>\n" );
document.write( "B)How long will it take for debt to exceed $15,000?\r<BR>\n" );
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document.write( "I think i have A) here is what i did on it:\r<BR>\n" );
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document.write( "d=9000*1.015^6<BR>\n" );
document.write( "d=$9,840.99\r<BR>\n" );
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document.write( "And i couldnt finish b part but here is where i got:<BR>\n" );
document.write( "$15,000=9,000*1.015^t<BR>\n" );
document.write( "6,000=1.015^t<BR>\n" );
document.write( "I just dont understand how to get the t down from an exponent and finsih it for t! \r<BR>\n" );
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document.write( "Any help is greatly appreciated THANKS! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #83729 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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/cgi-bin/show-face.mpl?user=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=83729\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> $15,000=9,000*1.015^t ___ DIVIDING by 9000 gives 5/3=1.015^t\r<BR>\n" );
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document.write( "taking the logarithm gives log(5/3)=t*log(1.015) ___ (log(5/3))/(log(1.015))=t </SPAN>\n" );
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