Question

If you earn 10% per year on your bank account, how long will it take an account with $105 to double to $210? Do not round intermediate celculations. Round your answer to 2 decimal places.) Number of years _________.

Answer 1

Answer:

n= 7.27 years

Explanation:

Giving the following information:

Interest rate= 10%

Future value (FV)= $210

Present value (PV)= $105

To calculate the number of years to double the investment, we need to use the following formula:

n= ln(FV/PV) / ln(1+i)  

n= ln(210/105) / ln(1.1)

n= 7.27 years