Please help fast!! The population P, in millions, of a certain country can be modeled by the function P(t) = 3.98(1.02)^t, where t is the number of years after 1990.

Part A) Write an equivalent function in the form P(t) = a(1+r)^t.

Part B) What is the value of r in your function from part A? What does this value mean in context?