If the annual interest on a principal is 4%, how many years before the amount is double?	Choose the correct choice:
A) 22
B) 25
C) 12
D) 13
E) 17
P = (P*4*R)/100   R = 20%   Answer: 25
<result>B</result>
If the annual interest on a principal is 4%, how many years before the amount is double?