Answer:
answer is b
Step-by-step explanation:
look at the picture
 
        
                    
             
        
        
        
Step-by-step explanation:
10300000 = 1,03 * 10⁷ 
 
        
                    
             
        
        
        
(10/12) / (4/6)...when dividing with fractions, flip what u r dividing by, then multiply
10/12 * 6/4 = 10/8 which reduces to 5/4 or 1 1/4
        
                    
             
        
        
        
1 centimetre=0.1 decimetre
therefore the answer is 2.5 decimetres.