Answer: 
b. comets
Step-by-step explanation:
 
        
                    
             
        
        
        
The value of 9 is 90 because it is in the tens place.
        
             
        
        
        
Answer:
6 meters
Step-by-step explanation:
Every 7 floors, it goes up by 22.4 meter intervals.
Let's count down,
the 7th floor would be 50.8 - 22.4, which is 28.4.
the 0th floor would be 28.4 - 22.4, which is 6.
 
        
                    
             
        
        
        
Answer:
735,130.
Step-by-step explanation:
The order of election of the 3 representatives does not matter so it is a combination.
The number of possible combinations
= 165! / 162! 3!
=  (165 * 164 * 163) / (3*2*1)
= 735,130.