Answer:
Let's use algebra to solve the problem. We can start by using the information given to set up an equation relating the number of fish in 2016 (x) to the number of fish in 2019 (x3):
x3 = 512
To solve for x, we can isolate x by dividing both sides of the equation by 3:
x = 512/3
x = 170.67 (rounded to two decimal places)
Therefore, there were approximately 170.67 fish in the aquarium in 2016. However, since we cannot have a fraction of a fish, we can round up to the nearest whole number to get the final answer:
x ≈ 171
So there were 171 fish in the aquarium in 2016.
Explanation: