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The population of a certain city increased by 9000 people. Write a signed number to represent this population change.

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Answer:

+ 9000

Explanation:

Given that :

Population of city increased by 9000

This means that the a new populatuon is : initial population size + 9000

To. Represent increase or growth , we use the addition operator : '+'

Hence, a signed number representing population change is ; + 9000

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