document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=386270>Question 386270</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the telephone extensions at a company use 4 digits<BR>\n" );
document.write( "a. how many extensions are possible if there are no restrictions?<BR>\n" );
document.write( "b. how many extensions are possible if the first digit cannot be 0 or 9?<BR>\n" );
document.write( "c. how many extensions are possible if the first digit can only be 1? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #273086 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=273086\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the telephone extensions at a company use 4 digits<BR>\n" );
document.write( "a. how many extensions are possible if there are no restrictions?<BR>\n" );
document.write( "Ans: 10^4 = 10,000<BR>\n" );
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document.write( "b. how many extensions are possible if the first digit cannot be 0 or 9?<BR>\n" );
document.write( "Ans: 8^10^3 = 8000<BR>\n" );
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document.write( "c. how many extensions are possible if the first digit can only be 1?<BR>\n" );
document.write( "Ans: 1*10^3 = 1000<BR>\n" );
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document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );