It's a stage of the very important Nitrogen cycle. All living things need Nitrogen, without it there is no life.
Prime meridian divides the earth into western and eastern hemispheres
Answer:
x = 3.5
Explanation:
The chords are the same length, so are the same distance from center:
3x +1 = x +8
2x = 7 . . . . . . subtract x+1
x = 3.5 . . . . . divide by 2
the world's current population is 7.3 billion and the world population in 1915 was 1.8 billion. The increase over the past century is 7.3 billion - 1.8 billion = 5.5 billion. So, the correct answer would be "more than 5 billion" (option D).
