document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=865065>Question 865065</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A typical Social Security number is 555-47-5593. How many Social Security numbers are possible if the first two digits cannot be 0?<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 #521481 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=521481\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"the first two digits cannot be 0\", but they can be any number in the set {1,2,3,4,5,6,7,8,9}\r<BR>\n" );
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document.write( "So you have 9 choices for the first two slots. The remaining 7 slots have 10 choices (0 through 9) since 0 is allowed\r<BR>\n" );
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document.write( "So you just multiply all the choices for each slot (this is the <a  rel=nofollow HREF=\"http://www.mathsisfun.com/data/basic-counting-principle.html\">counting principle</a> in action)\r<BR>\n" );
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document.write( "9*9*10*10*10*10*10*10*10 = 810,000,000\r<BR>\n" );
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document.write( "as a shortcut you can compute <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%5E2%2A10%5E7 ALIGN=MIDDLE  ALT=\"9%5E2%2A10%5E7\"   DISABLED_style= \"max-width:90%; height:auto;\" > to get the same answer. \r<BR>\n" );
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document.write( "Final Answer: <font color=\"red\">810,000,000</font>\r<BR>\n" );
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document.write( "Note: this is the number <font color=\"red\">810 million</font>\r<BR>\n" );
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document.write( "Another Note: In scientific notation, the answer is <IMG STYLE=\"max-width:80%;\" src=\"http://www.sciweavers.org/tex2img.php?eq=8.1%20%5Ctimes%2010%5E%7B8%7D&bc=White&fc=Black&im=jpg&fs=12&ff=arev&edit=0\" align=\"center\" border=\"0\" alt=\"8.1 \times 10^{8}\" width=\"81\" height=\"19\" /> Scientific notation is often used for really really large numbers.<BR>\n" );
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