SOLUTION: Phone numbers in the U.S. consists of 10 digits, a 3-digit area code and a 7-digit local number. How many different telephone numbers are possible within each area code, assuming t

Question 1156738: Phone numbers in the U.S. consists of 10 digits, a 3-digit area code and a 7-digit local number. How many different telephone numbers are possible within each area code, assuming that the local number cannot begin with 0 or 1?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Phone numbers in the U.S. consists of 10 digits, a 3-digit area code and a 7-digit local number. How many different telephone numbers are possible within each area code, assuming that the local number cannot begin with 0 or 1?
----------
7 digits.
The 1st digit is 1 of 8.
The other 6 are 1 of 10.
RELATED QUESTIONS
In 2014, a certain state added a ninth area code. Using the information about telephone... (answered by ikleyn)

A. How many 10-digit phone numbers in the 972 area code have at least one repeated digit? (answered by Edwin McCravy)

In a certain country, telephone numbers have 9 digits. The first two digits are the area... (answered by Boreal)

Telephone numbers in the US start with a 3 digit area code followed by a 7 digit local... (answered by Alan3354)

A seven digit phone number consists of a three-digit prefix followed by four digits. How (answered by edjones,extrella)

a seven digit phone number consists of a three-digit prefix followed by four digits. How... (answered by Fombitz)

Anna forgot the code of a 3-digit lock on her case (all digits ranging from 0 to 9).... (answered by anand429)

The access code to a house�s security system consists of seven digits. How many different (answered by Fombitz)

I need help with this math problem.Its a multiple choice & i need to know how you got the (answered by jim_thompson5910)