hello i need help with this application question

Question

How long will it take for $ 5200 to grow to $ 25,000 at an interest rate of 3.9% if the interest is compounded quarterly? Round the number of years to the nearest hundredth.

Answer 1

The equation is 25000 = 5200(1 + 0.039/4)^4t

Solving for t

t = 40.46 years

Answer 2