The rule of 72 implies that a country will double its income in about 9 years if its growth rate is:
A)4 percent.
B)6 percent.
C)8 percent.
D)11.1 percent.

Question

Quizplus · Accepted Answer

The rule of 72 is a simple way to estimate how long it will take for an investment or economy to double at a given annual growth rate. By dividing 72 by the growth rate, you get the approximate number of years needed to double. For a 9-year doubling period, the growth rate would be 72/9 = 8 percent.

The Rule of 72 Implies That a Country Will Double