Answer: Africa includes the rich source of water drainage in the form of rivers. 
Explanation:
The course travelled by the major rivers in Africa are as follows:
1. Congo: Center to north and further to the Western region finally drains into the Atlantic Ocean.
2. Nile: Northeastern part to the North and then finally to the Mediterranean Sea.
3. Zambezi: South eastern to Indian Ocean.
4. Niger: West to the Guinea Gulf. 
 
        
             
        
        
        
It seems you need to move the decimal three times over, then you round the number. So the answer would be 5.5 x 10^3.
        
             
        
        
        
Answer: economic activity map,climate map, physical map, population map, and then political map. 
Explanation:
edmentum
 
        
                    
             
        
        
        
Answer:
Correct answer is The US had a capitalist system, and the USSR had a communist system.
Explanation:
First option is not correct as democracy is a political, not economical system.
Second option is not correct, as United States fought against Socialism and Communism.
Third option is correct because Soviet Union had communist system, which included expropriation of land, while States developed Capitalism.
Last option is also not correct, due to  facts mentioned before.