In the United States a 5-digit zip code is used to route mail. How many possible 5-digit
Chapter 12, Problem 29(choose chapter or problem)
In the United States a 5-digit zip code is used to route mail. How many possible 5-digit zip codes are possible? (All numbers can be used.) If 0s were eliminated from the first and last digits, how many possible zip codes would there be?
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