Answer:
i think bubbles tbh
Explanation: oxygen, carbon dioxide and hydrogen produces bubbles
 
        
                    
             
        
        
        
1 AU means 1 astronomical unit or the aproximate distance from the earth to the sun 
1AU=<span>149597870.7 kiometers
1 billion=1,000,000,000
600 billion=600,000,000,000
</span>
<span>x times 1AU=600,000,000,000
x times </span>149597870.7=<span>600,000,000,000
solve for x
divide both sides by </span><span>149597870.7
</span>x=4010.75
so aprox 4011 AU's
        
             
        
        
        
The center of the world is the equator
        
                    
             
        
        
        
Answer:
B
Explanation:
Just did the assignment and buddy got me wrong