A= 20 let me know if you need an explanation❤️, mark me branliest pls
        
             
        
        
        
Initial cost = $126
Final cost = $150
Then
Amount of change = (150 - 126) dollars
                               = 24 dollars
Then
Percentage change = (24/126) * 100
                                 = 2400/126 percent
                                 = 19.05 percent
So from the above deduction we can easily conclude that the percentage change is 19.05%. I hope the procedure is simple enough for you to easily understand. You can generally use this method for solving similar kind of problems in future without requiring any kind of help from outside.
        
                    
             
        
        
        
Answer:
The correct option is C) The results were not statistically significant but were practically significant.
Step-by-step explanation:
Consider the provided information.
They found that the difference in these shelf lives had a p-value of 0.24. Assume an α of 0.05. 
We reject the null hypothesis if p value is less than α.
We are fail to reject null hypothesis if p value is greater or equal to α.
Here p value is greater than 0.05.
So, we do not reject null hypothesis and conclude that result is not statistically significant. But, there is a practical difference between 3 days and 7 days. 
Therefore, the correct option is C) The results were not statistically significant but were practically significant.
 
        
             
        
        
        

square root of negative is an imaginary solution or number. meaning it exist somewhere. square root of 64 is 8 and the square root of 25 is 5. "i" represent imaginary number