i am having a real problem figuring out population problems. is there someone willing to help?

Question

The population increase of iraq is given in the equation
A=A the a little o e^a.azst
where t is the years after 2003 . what will be the population A of iraq in 2020 if in 2003 it was 25 million

Answer 1

In other words, the population is being modeled as an exponentially increasing function, with

A = Ao * e^(r*t)

Where A is the new population,
Ao is the original population,
t is the elapsed time, in years,
and r is the instantaneous growth rate as a decimal fraction. r would usually be reported in percent per year, in which case r would be divided by 100% before used in this formula.

Unfortunately, as the problem is now stated, you have two unknowns, A and r, and only one equation. There is insufficient information to solve your problem. Ao is 25 million and t is 17 years, i.e., 2020 - 2003.

However, this model does not directly take into consideration deaths or immigration/emigration unless r is the overall growth rate. Even if r is defined in this way, this model assumes a constant r over the period of interest, a highly questionable assumption for Iraq at this period in its history.

Answer 2

Population Increase in IRaq??!!! People are fleeing there in droves

Answer 3

Hi. Does this help? http://www.physics.upenn.edu/courses/gladney/mathphys/subsection2_1_2.html