At what rate percent of simple interest will a sum of money double itself in 22 years?	Choose the correct choice:	A) 6.54 %	B) 4.54 %	C) 8 . 2 %	D) 4.94 %	E) 5.54 %

Rationale: "let sum = x . then , s . i . = x . rate = ( 100 * s . i . ) / ( p * t ) = ( 100 * x ) / ( x * 22 ) = 100 / 22 = 4.54 % answer : b"
Answer: B