If the annual interest on a principal is 8%, how many years before the amount is double?  Options
A) 11.3  B) 12  C) 12.5  D) 10.2  E) 11.2
P = (P*8*R)/100   R = 12.5   Answer: 12.5
<result>C</result>
If the annual interest on a principal is 8%, how many years before the amount is double?