A= P(1+i)ⁿ ,
where A is the value generated after a time " n" at an interest rate of i (in %).
When A = 2.P ?
Replace in the formula: 2.P = P(1+0.0665)ⁿ , after simplification by P, we get
2= (1+0.0665)ⁿ
To calculate n, let' use ln (Neperian logarithm)
ln(2) = n.ln(1.0665) and
n=(ln2)/(ln(1.0665) and n=10.76 years ,
