Answer:
Step-by-step explanation:
8000=4000(1+5/100)^t
8000/4000=(1.05)^t
2=1.05^t
log 2=log (1.05)^t
log 2=t log (1.05)
[tex]t=\frac{log 2}{log1.05}\approx~14.21~years[/tex]
