Answer:
9.35 years
Step-by-step explanation:
To find the numbers of years that have passed, you can use the following formula:
n = ln(FV / IV)/ln(1 + r)
n= number of periods
FV= Future value= $43,800
IV= Initial value= $24,500
r= rate= 6.4%
n=ln(43,800/24,500)/ln(1+0.064)
n= ln1.79/ln1.064
n=0.58/0.062
n= 9.35
According to this, 9.35 years have passed.