document.write( "Question 779176: How many seven-digit telephone number can be formed if the first three digits cannot be 800 and the first digit cannot be 0? \n" ); document.write( "
Algebra.Com's Answer #475244 by stanbon(75887)\"\" \"About 
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How many seven-digit telephone number can be formed if the first three digits cannot be 800 and the first digit cannot be 0?
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\n" ); document.write( "1st digit:: 8 ways
\n" ); document.write( "2nd digit:: 9 ways
\n" ); document.write( "3rd digit:: 9 ways
\n" ); document.write( "4th thru 7th:: 10
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\n" ); document.write( "Total:: 8*9^2*10^4 = 6480000 numbers
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H
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