Answer
16/9
Step-by-step explanation:
I don't know if this is right or not and I'm sry if its wrong 
but 16/9 divided by 4 = 9/4 
 
        
             
        
        
        
Answer:
72 signs
Step-by-step explanation:
90 min = 1.5 hour
6 hours hangs 6/1.5 * 18 signs = 72
 
        
                    
             
        
        
        
Answer:
D
Step-by-step explanation:
 
        
                    
             
        
        
        
The answer for 80,000 * 200 is 16,000,000
        
             
        
        
        
I^22 = i^(20 + 2) = i^20 x i^2 = (i^4)^(5) x (i)^2 = 1 x -1 = -1