Question 1200292

Nobody seems to want this, here my effort, for what its worth, I don't know
:
The population of a town grows at a rate of {{{e^(1.2t) - 2t}}} people per year (where t is the number of years).
 At t=2 years, the town has 1500 people.
{{{f(t-2) = e^(1.2t) - 2t + 1500}}}
 Approximately by how many people do the population grow between t=2 and t=5?
t=2, 1500, t=5, 1900. 1900 - 1500  = 400 increase from yr 2 to yr 5
 What is the town’s population at t=5 year? 
Approx 1900 people