The answer is c!!!!!!!!!!!!!!!!!!!!!!!!
        
                    
             
        
        
        
Answer:
I don't know how I would know but if he takes 30 minutes or less on each individual activity then he is correct, if he exceeds those limits, he is incorrect.
Step-by-step explanation:
 
        
             
        
        
        
Answer:2.4
Step-by-step explanation: 
12 * 20% = 12 * 0.20 = 2.4 hours
It will not last the entire shift.