Question

CHECK PLEASE -

Answer 1

You will need to use this formula:

Years = log (total/principal) / n * log (1 + (rate / n))
where "n" is the number of compounding periods per year.

Years = log (9,000/4,790.23) / n * log (1 + (.038 / n))
Years = log ( 1.8788241901 ) / 2 * log (1.019)
Years = 0.27388614314 / 2 * 0.0081741840064
Years = 0.27388614314 / 0.0163483680128
Years = 16.7531182884
Which is about 16 years 9 months (answer is "a")

Source:
http://www.1728.org/compint3.htm