At what rate percent on simple interest will a sum of money double itself in 30 years?
Options:
(A) 3 1/3%
(B) 3 1/9%
(C) 3 9/3%
(D) 3 2/3%
(E) 3 6/3% Think first, then make a decision. Some random thoughts:
P = (P*30*R)/100
R = 3 1/3% So the answer is (A).