How long does it take $6,000 to quadruple if it is invested at 9.1% interest compounded annually? a
15.9 years
b
17.8 years
c
37 years
d
222,222.22 years

1. 15.9 years

Step-by-step explanation:

You must solve this equation:

So

Take the log left and right:

use the log property that you can put the exponent in front:

n > 15.917