Answer:
16.5
Step-by-step explanation:
 
        
             
        
        
        
Answer = 14/8 
Step by step explanation 
2 x 7/8 
= (2x7)/8 
= 14/8
        
             
        
        
        
It takes 48 hours if 12 people built the same wall.
Please see the attached picture for full solution
Hope it helps
Good luck on your assignment
 
        
                    
             
        
        
        
Answer:
40%
Step-by-step explanation:
0.4=0.40
0.40×100
=40%
 
        
                    
             
        
        
        
7 + 7 + (-1)
7 + 7 - 1
13
Hope this helps :)