document.write( "Question 442718: The Phone Number Problem:My office phone is 270-809-6219.If the first number of the phone number cannot be zero how many possible numbers are there? \n" ); document.write( "
Algebra.Com's Answer #305396 by swincher4391(1107)\"\" \"About 
You can put this solution on YOUR website!
First of all, wow... you must live pretty close to me. Same area code.\r
\n" ); document.write( "\n" ); document.write( "To your question:\r
\n" ); document.write( "\n" ); document.write( "If your first number can't be 0, then you only have 9 possible numbers, (1-9).
\n" ); document.write( "The other 9 numbers, you can use all 10 numbers.\r
\n" ); document.write( "\n" ); document.write( "So 9 * 10^9 = 9,000,000,000 or 9 billion.\r
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