Area codes are the first three digits of a 10-digit telephone number. The first digit of an area code cannot be 0 or 1. a. How many area codes can be created if digits are allowed to be repeated? b. How

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Melyssa asked Jun 28, 2022

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Area codes are the first three digits of a 10-digit telephone number. The first digit of an area code cannot be 0 or 1.

a. How many area codes can be created if digits are allowed to be repeated?

b. How many area codes can be created if digits are not allowed to be repeated?

Mathematics
high-school

Melyssa asked Jun 28, 2022

by Melyssa

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Answer:A

Step-by-step explanation:because the numbers can be allowed to be repeated

Rodion answered Jul 4, 2022

by Rodion

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