Answer:
Please see the attached file for the complete answer.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
 2, 2, 3, 5, 7 that is the farthest you can go
Step-by-step explanation:
2,2,3,5,7 prime factorization of 420 but impossible to get 9 factors
 
        
             
        
        
        
(-5/3)•(-6/1)=(30/3)
(30/3) simplified is (10/1)
        
                    
             
        
        
        
I think -6 switches to -3
        
                    
             
        
        
        
The area of the model is 80 square foot
Step-by-step explanation:
Let the area of the house model be 'a'
The scale = 1:50
The area of the house= 4000 square foot
Area of the model =4000/50
a = 80 square foot
The area of the model is 80 square foot