4. about __ % of the world's population lives in
southwest asia, but on less than % of the world's
land area
10; 30
20: 5
30; 15

20: 5

explanation:

about 20% of the world's population lives in   southwest asia, but on less than 5% of the world's   land area.

b. 20: 5

explanation:

20% of the worlds population lives in southwest asia, and less than 5% of the world's

land area.