The formula below gives T, the approximate time in years it takes a population to double if the annual growth rate is r percent.
T=70/r
According to this formula, about how long will it take a population to double if the annual growth rate is 3.2%?
HINT: Do not convert the growth rate to a decimal before dividing.
A. 22 years
B. 26 years
C. 18 years
D. 30 years