In a different plan for area codes, the first digit could be any number from 0 through 3 the second digit was either 3 or 4, and the third digit could be any number except 3, 4, or 9. With this plan, how many different area codes are possible?
In a different plan for area codes, the first digit could be any number from 0 through 3 the second digit was either 3 or 4, and the third digit could be any number except 3, 4, or 9. With this plan, how many different area codes are possible?
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter2: Working With Real Numbers
Section2.3: Rules For Addition
Problem 7P
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In a different plan for area codes, the first digit could be any number from 0 through 3 the second digit was either 3 or 4, and the third digit could be any number except 3, 4, or 9. With this plan, how many different area codes are possible?
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