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When three-digit telephone area codes were first put in place in the United States and Canada, the first number
could be any digit from 2 through 9, the second number could only be 0 or 1, and the third number could be any
digit from 0 through 9. How many possible area codes can be created with this format?
a. 24
b. 126
c. 140
d. 160
Sagot :
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