Answer: This study uses a control group, this study uses repeated measures design, and this study uses random sampling
Step-by-step explanation:
 
        
                    
             
        
        
        
Sales increased 50% last year, from $5,000 to $10,000. When sales dropped from $10,000 to $5,000 this year, sales decreased 50%
 
        
             
        
        
        
I believe the decimial point divides between the dollar value and the cent value in american currecy. aka the decimial point symbolizes the cent value.
        
             
        
        
        
answer for this question is (d)3x2-x+6
 
        
                    
             
        
        
        
Answer:
2*x^3 + x^2 + x
Step-by-step explanation:
a^b = x
Then, 
a^(2b) = a^b*a^b = x* x = x^2
a^(3b)  = a^b*a^b*a^b = x*x*x = x^3
2*(a^3b) + (a^2b) + (a^b)
= 2*(x^3) + (x^2) + (x)
= 2*x^3 + x^2 + x