????
how oft du yu kompount the interest ?????????
If wons a yeer, yu hav 1.055^x=(11,409/5000)=2.2818
x*log(1.055)=log(2.2818)
x=log(2.2818) / log(1.055)
if yuze log10,...log10(2.2818)=0.3582775757952279
log10(1.055)=0.02325245963371156
0.358277.../0.02325245...=15.4081639104073 yeers