SOLUTION: if you know your original investment amount (i.e. $1000) and you know your capital doubles every 6 years, how do you determine your interest rate percentage?

Question 229682: if you know your original investment amount (i.e. $1000) and you know your capital doubles every 6 years, how do you determine your interest rate percentage?
Answer by Edwin McCravy(20086) (Show Source): You can put this solution on YOUR website!
if you know your original investment amount (i.e. $1000) and you know your capital doubles every 6 years, how do you determine your interest rate percentage?


If it's simple interest then



Then the interest in  years must equal the principle ,
so we substitute  and  in the above equation
and get




Divide both sides by 











Edwin

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