Re: What difference does a few percent make?
Author: Theresa Lynn Ford
Created: Thursday, 1/27/2005 9:43 AM
What difference does a few percent make?
We are presently at 6.2 billion people.
(1) If the population growth of the world was at 3% each year how many people will there be in 20 years, by the year 2024?
The formula for exponential growth is: N(t) = N(0) x ert
Where: N() is the quantity t is the time e is the natural logarithm r is the rate N(0) is the starting quantity N(t) is the quantity after the time has passed
With 6.2 billion in 2004, N(0)=6.2 and the formula is: N(20) = 6.2 x e(.03 x 20) N(20) = 6.2 x e(.6) N(20) = 6.2 x 1.8221188 N(20) = 11.2971366 Therefore the population in 2024 is approximately 11.3 billion.