In 2016, a school started its own aquarium with n’2 fish. In 2021, there were n² fish in the same aquarium. There were 81 fish in 2021. How many fish were there in 2016?
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From the information, the school started its own aquarium with n fish and in 2021, there were n² fish in the same aquarium, there were 81 fish in 2021.

Therefore, the fish in 2016 will be:

n² = 18

Square root both sides

n = ✓81

n = 9

Therefore, there are 9 fishes in 2016.

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In 2016, a school started its own aquarium with n’2 fish. In 2021, there were n² fish in the same aquarium. There were 81 fish in 2021. How many fish were there in 2016? Show your work

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In 2016, a school started its own aquarium with n’2 fish. In 2021, there were n² fish in the same aquarium. There were 81 fish in 2021. How many fish were there in 2016?
Show your work