Why does population composition matter

Maps showing the regional distribution and density of populations tell us about the number of people in coun- tries or regions, but they cannot reveal two other aspects of those populations: the number of men and women and their ages. These aspects of population, the population composition, are importants because a populous coun- try where half the population is very young has quite dif- ferent problems from a populous country where a large proportion of the population is elderly. When geogra- phers study populations, therefore, they are concerned not only with spatial distribution and growth rates but also with population composition.

To solve this integral, what you can do is split it up as follows: (1) ∫40(x2−4)dx=∫40(x2)dx−∫40(4)dx. to integrate  4  as an  indefinite integral, a good rule of thumb is  by  an equation below  for  polynomials; . (2) ∫xa=xa+1a+1+c , where a is any number. c denotes some constant that is crucial when doing