Total hours is 3.35 hours
<u>Explanation:</u>
Given:
convert 3 hours 21 minutes to decimal hours
We know:
1 hour = 60 minutes
and
1 minute = 60 seconds
1 minute = 1 / 60 hours
So,
21 minutes = 
                   = 0.35 hours
Total hours would be = 3 hours + 0.35 hours
                                     = 3.35 hours
Therefore, total hours is 3.35 hours
 
        
             
        
        
        
Fire burning wood or a other thing
        
                    
             
        
        
        
The answer is C. I hope this helps you.
        
             
        
        
        
Gravitational force depends on inverse square law. That is, gravitational force is inversely proportional to square of distance between asteroids.
As distance between them decreases, gravitational force increases. Hence A is correct.