Answer:
   4
Step-by-step explanation:
9991 = 97×103
The greatest prime factor of 9991 is 103. The sum of digits of 103 is 1+0+3 = 4.
 
        
             
        
        
        
Answer:
there is no common difference. it is not constant.
 
        
             
        
        
        
Answer:
90 m
Step-by-step explanation:
The piece on the right side fits perfectly in the left side so you can move the triangle to the left in order to make a square. After that, you can do 10 times 9 because 5+4=9 to get 90m as the area. 
 
        
                    
             
        
        
        
Answer:
3 hours and 21 miinutes
Step-by-step explanation:
 
        
             
        
        
        
Answer:

Step-by-step explanation:












