how many phone # are possible?
a telephone # has 3 parts: an area code, an exchange, and a suffix how many different telephone #’s are possible?? (please show all work)
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7,920,000 available #’s for each area code.
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When the numbers run out they will start adding letters
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100000000000, or 10^10, 10 possible numbers for each number, 10 digit number.
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