document.write( "Question 691445: How many different 10-digit phone numbers exist with an area code of 281?\r
\n" ); document.write( "\n" ); document.write( "My first question was how many different 10-digit phone numbers exist in which I solved 92,378. I am thrown off by the question involving the exact area code. \n" ); document.write( "
Algebra.Com's Answer #426700 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
How many different 10-digit phone numbers exist with an area code of 281
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document.write( "       1st one is 281-000-0000\r\n" );
document.write( "       2nd one is 281-000-0001\r\n" );
document.write( "       3rd one is 281-000-0002\r\n" );
document.write( "       4th one is 281-000-0003\r\n" );
document.write( "          ...\r\n" );
document.write( " 9999998th one is 281-999-9997\r\n" );
document.write( " 9999999th one is 281-999-9998\r\n" );
document.write( "10000000th one is 281-999-9999\r\n" );
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document.write( "So there are 10,000,000.\r\n" );
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document.write( "Or you can do it by saying there are 10 ways to\r\n" );
document.write( "choose the 1st digit after the the 281.  Then\r\n" );
document.write( "10 ways to choose the 2nd digit after the the 281,\r\n" );
document.write( "etc, to 10 ways to choose the 7th digit after 281:\r\n" );
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document.write( "so the answer is 107 = 10,000,000.\r\n" );
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document.write( "Ten million phone numbers.\r\n" );
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document.write( "Edwin
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