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,

Answer:
<u><em>26/3 is your answer as a improper fraction </em></u>
<u><em>8.6 is your answer as a decimal </em></u>
<u><em>8 2/3 is your answer as a mixed number </em></u>
How to add mixed numbers Step-by-step:
1) find the least common denominator
2) find the equivalent fractions
3) add the the fractions, add the whole numbers
4) write your answer in lowest terms
Step-by-step explanation:






Hope this is correct and helpful
HAVE A GOOD DAY!
Answer:
the anwser is y=5600
I'm going to just go by this because of research and you didn't show the 4 problems so if this fixes your question then there you go