At what rate percent on simple interest will a sum of money double itself in 30 years?
Choose the correct choice from the following.
A) 3 1/3%	B) 3 1/8%	C) 3 6/3%	D) 9 1/3%	E) 3 3/3%
P = (P*30*R)/100   R = 3 1/3%   3 1/3%nswer: 3 1/3%
<result>A</result>
At what rate percent on simple interest will a sum of money double itself in 30 years?