Answer:
1990 and 2010

Explanation:
Let:

We need to know, in what year(s) the villages had the same population, mathematically this is:

So:

Solving for x:
Factoring

Hence:

Therefore the year(s) which the village had the same population are:

In order to find the population of both cities during the year(s) of equal population, just evalue the equations at x=15 and x=35:

Answer:
the troposphere is the atmosphere
Answer: :B) 'Prevent France from recapturing the Louisiana Territory
Explanation: