How many 10-digit telephone numbers (area code + number) are possible if the first digit cannot be zero, the first three digits cannot be 800 or 900, and the number must end in 0000?
A) 654,642
B) 898,000
C) 900,000
D) 899,000

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The Answer of How many 10-digit telephone numbers (area code + number) are possible if the first digit cannot be zero, the first three digits cannot be 800 or 900, and the number must end in 0000?
A) 654,642
B) 898,000
C) 900,000
D) 899,000

How Many 10-Digit Telephone Numbers (Area Code + Number) Are