The population of a city, in millions, since 1990 has grown at a rate of π P'(t) = 0.30e0.039t π million people per year, where π t π is the number of years after 1990. If there were 1.88 million people in the city in 1990, what is the population in 2020?
a) 3.12 million
b) 3.02 million
c) 3.22 million
d) 3.32 million