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a_sh-v [17]
4 years ago
14

PLEASE HELP The ZIP code is a 5-digit number that is unique to a specific region of the country. If the digits 0-9 are used, how

many ZIP codes are possible with 0 as the last digit? Note that, in this case, the first digit can't be 0.
90,000



18,000



10,000



9,000
Mathematics
1 answer:
Eduardwww [97]4 years ago
7 0

Answer:

9000

Step-by-step explanation:

The first digit can't be 0, so there are 9 numbers that can be used for the first digit.  The fifth digit must be 0, so there's only 1 number that can be used.  The other three digits can be any of 10 numbers.

So the number of zipcodes is:

9 × 10 × 10 × 10 × 1 = 9000

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