Biology Forums - Study Force

Question 41 of 60   1.667 Points
The global human population is 6.4 billion. The birth rate is 21 per thousand per year, the death rate is 9 per thousand per year, and the fertility rate is 2.8 children per woman’s lifetime. Which figure below is closest to the number of people added to the planet per year in excess of those that die?

 

   A. 77 million.   
 

   B. 48 million.   
 

   C. 2.8 million.   
 

   D. 10 million.   
 

   E. 133.4 million.   

You'd need a specific equation for this. Do you recall learning about an equation that relates these factors?

That's true, does anyone know it?!