It means it's a 3 beat rest not matter what. You always have to pay attention to the time signature.
        
             
        
        
        
Some positive affects music can give to you is it can make you happy or persistent in something, but music can also be distracting sometimes and it could also make you sad. 
sorry if i did this completely wrong
        
                    
             
        
        
        
Answer:
ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmm B?
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Answer:
That's what I would like to know...
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