Answer:
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Step-by-step explanation:
 
        
             
        
        
        
Answer:the answer is 44
Step-by-step explanation: cuz  40 divided by 90%= 44
 
        
                    
             
        
        
        
Answer:
c=10
Step-by-step explanation:
 
        
             
        
        
        
The only way to do that is with  +7  and  -7 .
        
             
        
        
        
Answer:
An experimental study
Step-by-step explanation:
An experimental study should be used. This will enable the energy  drink manufacturer to have an experimental group and control group. Using experimental study, the effect of independent variables on the dependent variables can be determined with the amount of the drink consumed as the controlled factor.