Answer:
A. k = 0.001
B. 693 years
Step-by-step explanation:
An exponential function has the following form:

Where a is the initial value and k is the growth or decay rate.
So, if the equation is:

Therefore, the growth rate is 0.001.
Now, to know how long will it take the country to double its population, we can use the equation:

Where k is the growth rate. So, replacing k by 0.001, we get:

Therefore, the country will double its population 693 years after 2003