document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28323>Question 28323</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A telephone number consist of seven digits, the first three representing the exchange.  How many different telephone numbers are possible within the 537 exhange? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15393 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15393\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Subtract 3 from 7, because the exchange is always the same. That leaves 4 digits<BR>\n" );
document.write( "the number of possible digits is 10 namely, 0,1,2,3,4,5,6,7,8,9<BR>\n" );
document.write( "Each of these 10 possible digits can combine with the second digit's 10 possibilities in 10 x 10 different ways. These 10 x 10 possibilities can<BR>\n" );
document.write( "combine with the third digit in 10 x 10 x 10 different ways. <BR>\n" );
document.write( "These 10 x 10 x 10 possibilities can<BR>\n" );
document.write( "combine with the fourth digit in 10 x 10 x 10 x 10 different ways.<BR>\n" );
document.write( "So the answer is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10%5E4 ALIGN=MIDDLE  ALT=\"10%5E4\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );