The Rule of 70 States That

Multiple Choice

The rule of 70 states that:

A) if grows at a rate of g percent per year,then the number of years it takes
to double is approximately equal to 70/g.
B) if grows at a rate of g percent per year,then the number of years it takes
to double is exactly equal to 70/g.
C) if grows at a rate of g percent per year,then the number of years it takes
to double is approximately equal to g/70.
D) if grows at a rate of g percent per year,then the number of years it takes
to triple is approximately equal to 70/g.
E) if grows at a rate of g percent per year,then the number of years it takes
to double is approximately equal to 70/(1 + g) .