Answer: first multiply then determine if you should add or subtract.
Step-by-step explanation:
 
        
                    
             
        
        
        
Center of the door
26 1/3 divided by 2
change to an improper fraction
(3*26+1)/3 =79/3 
79/3 divided by 2
copy dot flip
79/3 * 1/2
79/6
change to a mixed number
13 1/6
10 1/4 divided by 2
change to an improper fraction (4*10+1)/2 = 41/4
41/4 divided  by 2
copy dot flip
41/4 * 1/2 =41/8 
change to a mixed number
5 1/8
the left of the bar should be 5 1/8 from the center
to find how far from the left side to place the bar
13 1/6 - 5 1/8 =
get a common denominator
13 4/24 - 5 3/24= 8 1/24 inches
Answer:  place the bar 8 1/24 inches  from each  edge
 
        
             
        
        
        
I don't know the options but I guess it would be something like this:
40,000 < x < 50,000
        
             
        
        
        
Divide it into two squares.
The first square is just (1)1, which equals 1 cm^2, and add that to the second square, which is just (2)2, which equals 4, so 1+4=5 cm^2.