B). 10.63 
Because 7^2=49 and 8^2=64 then 49+64=113 then the square root of 113 is 10.63
        
                    
             
        
        
        
Answer:
 its a geometric sequence where each term is 3 times the previous term. 
Step-by-step explanation:
{2,6,18,54,162,486,1458...}
 
        
             
        
        
        
Answer:
The fourth of twenty is 5
Step-by-step explanation:
The 4th of twenty implies that we divide the number twenty into 4 place, let's us divide it 4 
20/4= 5
This problem bothers on on division of numbers and it requires proper understanding of words/terms associated with it. 
 
        
             
        
        
        
Answer:
I'd say $18 
Step-by-step explanation:
I cant really tell, but your best guess is $18