Question

Three years ago, a **5 km ^{3}** section of
the Great Lakes was studied and approximately

Over the three years, there were

1. Calculate the **population density** at the end
of the third year

Answer #1

Let's find out population at the start of the 3 years.

Total 89000 colonies gave rise to 120 colonies in 3 years , in 1 year 40 colonies and out of those only 2 % will survive ie, 2.4 colonies in 3 years by each 89000 colonies is produced.

So, total colonies = 89000× 2.4 = 213600 colonies.

Now,97000 became dead , colonies left = 213600-97000= 116600

Out of this 85000 colonies left the area

So population density left after 3 years = 116600-85000 = 31600 colonies.

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