At what rate percent on simple interest will a sum of money double itself in 30 years? Pick one:
A) 3 1/9%
B) 3 7/3%
C) 7 1/3%
D) 5 1/3%
E) 1 1/3%
P = (P*30*R)/100   R = 3 1/3%   3 1/9%nswer: 3 1/9%
<result>A</result>
At what rate percent on simple interest will a sum of money double itself in 30 years?