How long did it take to get from 6 billion to 7 billion people? What does this mean about the rate of population growth

How does central place theory explain patterns in the size and distribution of cities?

What are the answers for the following questions?

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?