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Mathematics, 12.09.2019 20:30 amanda2517
How many phone numbers are possible in the (770) area code if: for the form abc-, a is restricted to numbers 2-9. b, c, and x can be any digit 0-9. also, the number 867-5309 is not used.
a. 6,999,999 c.7,999,999
b. 7,000,000 d.8,000,000
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How many phone numbers are possible in the (770) area code if: for the form abc-, a is restricted t...
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