Answer: the third one
Step-by-step explanation:
 
        
             
        
        
        
First find the perimeter. Then take the depth of the pool and multiply it by the perimeter.
Hope this helps
        
                    
             
        
        
        
Answer:
25%
400%
Step-by-step explanation:
37=148x
x=0.25
25%
148=37x
x=4
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
 
        
                    
             
        
        
        
Step-by-step explanation:
a).
n! is 

(n-3)! is 

If we divide the two, everything behind (n-3) will just cancel out so we would be left with only

So the answer to a is 

b 
Permutations formula of P(6,4) is 
6!/(6-4)!, or 6!/2!. 

Then we divide by 4!

The answer to b is 15