Answer:

Explanation:

Round to three significant digits

 
        
             
        
        
        
0.004 of something added to 0.12508 of the same thing 
adds up to 0.12908 of it.  
The thing could be a glass of water, a sheet of paper, 
a pound of ground beef, a gallon of gas, or a snowball.  
In this problem, it just happens to be a dm. 
        
             
        
        
        
Scattering occurs when light changes direction after colliding with particles of matter.
        
             
        
        
        
They use x-rays to diagnose broken bones