Question

The current population of Smyrna, Maine, is 380 and grows at a rate of 3% per year. Which equation could be used to determine how many years it will take for the population to reach 420 people?

Answer 1

The number of people after n years is calculated through the equation,
An = (Ao)(1 + r)^n
where An is the population after n years, Ao is the initial population and r is the rate. Substituting the known values,
420 = (380)(1 + 0.03)^n
The answer is letter A.