All of them are 3.14 
I got them all right on I ready :)))
 
        
             
        
        
        
Answer: 7
Step-by-step explanation: if it a square then both side have to be same length so just divide 14 by 2 to get 7
hope this helps mark me brainliest please
 
        
                    
             
        
        
        
Answer:
you cant follow you can friend also hello 
Step-by-step explanation:
 
        
                    
             
        
        
        
the first 4 is in the hundreds thousands place. The second 4 is in the ten thousands place
        
                    
             
        
        
        
Answer:
Number of workers = 20.
Step-by-step explanation:
p = - 4w^2 + 160 w
We need to find the value of w when p is a maximum. 
We need to convert the equation to vertex form:
p = -4w^2 + 160w
p = -4(x^2 - 40w)
p = -4 [ (x - 20)^2 - 400]
p =  -4(x - 20)^2 + 1600.
So the vertex is at  (20 , 1600)
The maximum profit is 1600 and the number of workers = 20.