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Mathematics, 21.11.2019 19:31 drezz76

In a plan for area codes, the first digit could be any number from 3 through 8, the second digit was either 0 or 4, and the third digit can be any number but 0. with this plan, how many different area codes are possible?

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In a plan for area codes, the first digit could be any number from 3 through 8, the second digit was...
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