A useful rule of thumb called the "Rule of 70" states that if something grows at a constant rate of Z percent per year,it doubles in size approximately every __________ years.
A) 70 - Z
B) 70/Z
C) Z/70
D) 70 × (Z/100)

Question

Quizplus · Accepted Answer

The Rule of 70 states that if something grows at a constant rate of Z percent per year, it doubles in size approximately every 70/Z years. Therefore, the answer is (B) 70/Z.

A Useful Rule of Thumb Called the "Rule of 70