Mathematics, 19.05.2020 03:05 kellysurgit

5) Telephone numbers in the
United States begin with a
3 digit area code followed
by 7 digits. Area codes and
local telephone numbers
cannot begin with O or I.
How many telephone
numbers are possible?

Answers: 1

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5) Telephone numbers in the
United States begin with a
3 digit area code followed
...