Solve the problem.
-How long will it take for the population of a certain country to triple if its annual growth rate is 5.4 ? (Round to the nearest year.)
A) 9 years
B) 20 years
C) 56 years
D) 1 year

Question

Quizplus · Accepted Answer

To find the time it takes for a population to triple with a constant growth rate, we use the rule of 70, which is an approximation for exponential growth. The formula is: Time (years) = 70 / growth rate. Here, the growth rate is 5.4, so Time = 70 / 5.4 ≈ 12.96 years to double. To triple, it takes about 1.5 times the doubling time, which is approximately 19.44 years, rounded to 20 years.

Solve the Problem. -How Long Will It Take for the Population of a Population