A company made $100,000 profit this year. If they anticipate that profits will increase by 6% a year going forward, how long will it take for the profits to double?

A. Between 9 and 10 years

B. Between 10 and 11 years

C. Between 11 and 12 years

D. Between 12 and 13 years

E. None of the above

I was able to solve the question using excel

just wondering if there was some kind of equation in the case excel couldnt be used