If a Population of 100 Birds Increases to 120 Birds

Question

If a population of 100 birds increases to 120 birds in a year, what is the value of r?
A) 20
B) 0.16
C) 1.2
D) 2
E) 0.20

Accepted Answer

The growth rate (r) is calculated as the change in population divided by the initial population. Here, (120-100)/100 = 0.20.