How many different five-digit phone numbers can be used in one area code if no phone number begins with 0 or 1?
?

A. 40,000
B. 80,000
C. 100
D. 100,000
E. 240,000


Answer: B

Mathematics

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A. -20 B. -14 C. -18 D. 21

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A. - 
B.
C. - 
D.

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Solve the problem. Snell's Law states that  Use this law to find the requested value. If      find  Round your answer to the nearest degree.

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Mathematics