Question
The standard telephone number in the U.S has 10 digit; for example John telephone number is (703)323-3000. How many phone numbers are possible for the
The standard telephone number in the U.S has 10 digit; for example John telephone number is (703)323-3000. How many phone numbers are possible for the 703 area code if the first digits that follows the 703 cannot be a 0 or a 1?
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Mobile Usability
Authors: Jakob Nielsen, Raluca Budiu
1st Edition
0133122131, 9780133122138
