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marjorieheckaman
marjorieheckaman
12.01.2020 • 
Mathematics

Phone numbers consist of a three-digit area code followed by seven digits. if the area code must have a 0 or 1 for the second
digit, and neither the area code nor the seven-digit number can start with 0 or 1, how many different phone numbers are
possible? how did you come up with your answer?
a 8-10-10-8-10-10-10 10 10 10 = 6,400,000,000
b. 8-2-10-8-10 10 10 10 10 10 = 1,280,000,000
c. 8-2-10-8-10-10-10 10 10 - 128,000,000
d. 8-2-10-8-10-10-10 10 10 10 - 10 = 12,800,000,000
select the best answer from the choices provided
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mark this and return
save and exit
nextlm

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