Each shirt costs 8 dollars.
4 Shirts 1 Pant
1 Pant=20 dollars 
52 (total)-20=32
4shirts divides by 32= 8
So 8 dollars per shirt
        
             
        
        
        
Answer:
1910.09
Step-by-step explanation:
A≈1910.09
r	Radius	
4
h	Height	
72
 
        
                    
             
        
        
        
Answer:
1 and 9
Step-by-step explanation:
By the Triangle Inequality Theorem, the sum of two side lengths of a triangle is always greater than the length of the third side. 
In other words, in a triangle with side lengths  and
 and  we always have
 we always have 
Applying this to this question, the other side length,  must satisfy the following inequalities:
 must satisfy the following inequalities:

Solving these inequalities gives

Combining these solutions, we have  Therefore, the length of the third side falls between 1 and 9.
 Therefore, the length of the third side falls between 1 and 9.
 
        
             
        
        
        
The substance's half-life is the time 

 that satisfies

Solve for 

:



Which means the half-life is 

 days.