Multiply each term in one bracket in turn by the terms in the other bracket
Put them together we have
7-9-0-0-0-0-0-0-0-0-0-0-6-6-6-6--6-6-6-6-6-6-6-6-6-6-6-
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Multiply each term in one bracket in turn by the terms in the other bracket
Put them together we have
So, here we have an exponential function.
Remember that an exponential function has the form:
Where a represents an initial amount, and r is the rate of this amount to change. (Increase, or decrease).
So, given that the population of City A in 2000 was 40 thousand people and the population increased by 13% each year, we can say that
So,
For city B:
But something different happens with city C. This is not an exponential function, this is a linear function.
So,
The answer is
and 