assuming efficiency of each man to dig trench, in one day, for one hour is constant, 

so one man, working for one hour in one day can dig 1.5 m
so 8 men, working 3 hours a day and will take, say $d$ number of days and efficiency will be constant. so,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
 
        
             
        
        
        
Answer:
Nat Turner mentions his past stories of childhood where he had an experience that seemed to his family like an indication of the powers of prophesy. He thought very highly of himself, he grew up believing he was destined for great things.
Explanation:
I wasn't sure what else to add 
 
        
             
        
        
        
The Nile River was the body of water that connected trade between Egypt and Nubia.
        
                    
             
        
        
        
He drafted soldiers and raised taxes making himself less popular, underestimated the power of nationalism, and lost most of his army in Russia.
        
             
        
        
        
The answer is Perspectives, they taught themselves about different perspectives to help them put depth into their artwork.