SOLUTION: If I have three prefixes, 584,585, and 586, how do I calculate the number of telephone numbers that can be made?

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Question 566759: If I have three prefixes, 584,585, and 586, how do I calculate the number of telephone numbers that can be made?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the number following the prefix can be from 0000 to 9999 (10,000 numbers)