 
 <translate> 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: <hau> A wane kashi ne a kan riba mai sauƙi adadin kuɗi zai ninka cikin shekaru 30? Zaɓuɓɓuka: (A) 3 1/3% (B) 3 1/9 cikin dari (C) 3 9/3 cikin dari (D) 3 2/3% (E) 3 6/3% Ka yi tunani kafin ka yanke shawara. Wasu tunani bazuwar: 