Well if you are looking for the profit margin we need how much is was when she bought it, because it doesn't say, you can't say It's a increase or a decrease, so you could say this is a investment.
But considering you put this under mathematics I assume there is more to this question you forgot to post.
        
             
        
        
        
10g = 4/6....divide both sides by 10
g = (4/6) / 10
g = 4/6 * 1/10
g = 4/60 which reduces to 1/15 <==
        
                    
             
        
        
        
Hi there!
Since the scale is 1 in = 4 ft, we divide both the length and width by 4 to get the new length and width with the scale factor applied. 
16 / 4 = 4
12 / 4 = 3
So, the
length = 4
width = 3
Hope this helps!
        
             
        
        
        
Answer:
1. (-0,286; 0), (1,333; 0)
2. (0; -8)