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04-02-2020
Social Studies

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How many different Zip Codes are possible using the old style (five digits) and the new style (nine digits)?

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beingteenowfmao beingteenowfmao

04-02-2020

Answer:

old style (five digits)

Solution: 10×10×10×10×10=105

the new style (nine digits)

Solution: 10×10×10×10×10×10×10×10×10=109 the old style if it cannot start with a zero

Solution: 9×10×10×10×10=9×104 =90,000

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