Rule of 72 as a short cut method is explained by the formula:

(A) 72 divided by the annual interest rate ()
(B) Annual interest rate dividend by 72 (X)
(C) 72 divided by (annual interest rate multiplied by discount factor) (X)
(D) None of these (X)

Answers: Rule of 72 as a short cut method is explained by the formula  72 divided by the annual interest rate.