document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=287588>Question 287588</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Each time a bar of soap is used, its volume decreases by 10%. What is the minimum number of times a new bar would have to be used so that less than one-half its volume remains?\r<BR>\n" );
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document.write( "(A) 5 (B) 6 (C) 7 (D) 8 (E) 9 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208394 by </B><A HREF=/tutors/aboutme.mpl?userid=CharlesG2><B>CharlesG2(834)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CharlesG2><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=208394\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Each time a bar of soap is used, its volume decreases by 10%. What is the minimum number of times a new bar would have to be used so that less than one-half its volume remains?\r<BR>\n" );
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document.write( "(A) 5 (B) 6 (C) 7 (D) 8 (E) 9\r<BR>\n" );
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document.write( "new<BR>\n" );
document.write( "0.9 * new (first use)<BR>\n" );
document.write( "0.9 * 0.9 * new (second use) --> 0.81 * new<BR>\n" );
document.write( "0.9^3 * new (3rd use) --> 0.729 * new<BR>\n" );
document.write( "0.9^4 * new (4th use) --> 0.6561 * new<BR>\n" );
document.write( "0.9^5 * new (5th use) --> 0.59049 * new<BR>\n" );
document.write( "0.9^6 * new (6th use) --> 0.531441 * new<BR>\n" );
document.write( "0.9^7 * new (7th use) --> 0.4782969 * new\r<BR>\n" );
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document.write( "C. 7<BR>\n" );
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