8/0.72 = 0.09 
Per ounce cost $0.09 
This gonna help you
        
                    
             
        
        
        
To solve the problem, what you must do is a system of two equations with two Ingonites that describe the problem.
 Let:
 x = number of shirt buttons.
 y = number of buttons on jackets.
 Writing the system:
 36x + 42y = 842
 6x + 7y = 137
 We observe that the system is linearly dependent, therefore, it can not be solved.
 However, the solution is to solve the system of two equations with two unknowns.
In order to solve it, the system must be linearly independent.
        
                    
             
        
        
        
Answer:
322
Step-by-step explanation:
We have,
a^3+b^3=(a+b)^3-3ab(a+b)
p+1/p=7
Now,
p^3+1/p^3=(p+1/p)^3-3*p*1/p(p+1/p)
                =7^3-3(7)=343-21=322
 
        
             
        
        
        
Answer:
exact form: 98/15  decimal form: 6.53  mixed number form: 6 8/15
Step-by-step explanation:
hope this helped