The Rule of 70 States That the Level of a Variable

Multiple Choice

The Rule of 70 states that the level of a variable will double in

A) 70 years.
B) the number of years equal to the variable's annual rate of growth divided by 70.
C) the number of years equal to 70 divided by the variable's annual growth rate.
D) the number of years equal to the variable's annual growth rate minus 70.
E) the number of years equal to 70 multiplied by the variable's annual growth rate expressed as a decimal.