What does the graph predict about the world in the year 2050? World Population Growth
20,000
10,000
World
5,000
2,000
Asia
Africa
1,000
Europe
500
200
100
United States,
Canada, and Greenland
Mexico,
Central America, Caribbean Islands,
and South America
Oceania (Australia and
nearby islands in the Pacific)
50
20
70
2000
2010
2020
1950
1960
1970
1980
1990
2030
2040
2050
A. The birthrate and death rate will be nearly equal.
B. The birthrate will be double the death rate.
C. The carrying capacity will be decreasing quickly.
D. Earth's population will be increasing quickly.

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

its first and third is your answer i did the qustion the fourth isnt right

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.