63 I think, you would subtract
        
                    
             
        
        
        
Answer: C
Explanation:
Sqrt 9 x sqrt 4 = sqrt 9 x 4
        
                    
             
        
        
        
Answer:31
Step-by-step explanation:
 
        
                    
             
        
        
        
3.7cm on the map represents 1850km in reality
3.7cm : 1850km
1cm : 1850/3.7 km
1cm : 500km
Scale statement for map is :          1cm : 500km. 
That is 1cm on map represents 500km.
1cm : 500km.       Recall 1km = 1000m = 100 000cm
1cm : 500* 100000cm
1cm : 50 000 000cm
1: 50 000 000.
Scale factor is 50 000 000.