The human population on earth grew at an extraordinary rate during the 20th century, when it increased from 1.65 billion to 6 billion. what kind of curve would accurately show the changes in the human population during the 20th century? a. a life span curve b. an exponential curve c. a logistic curve d. a survivorship curve

The answer is B; exponential growth.   This is a phase of the S-shaped logistic curve of population growth that is characterized by a high birth rate and low death rate. The population doubles with each generation. Exponential growth is modeled by use of a J-shaped curve.

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.