Answer:
31.4 meters 
Step-by-step explanation: use the formula 2 times pi times 5 then you just plug in 5 into the radius 
 
        
                    
             
        
        
        
In 4 seconds, number of beats = 28
In 1 sec., it is = 28/4 = 7
Now, In 30 seconds, it would be: 30 * 7 = 210
In short, Your Answer would be: 210 beats
Hope this helps!
        
                    
             
        
        
        
Answer:
0.24
Step-by-step explanation:
also i see what you did there