Answer:
A  99% confidence interval  will be wider than a 95% confidence interval 
Step-by-step explanation:
From the question we are told that 
   The  95% confidence interval for for the mean foot length for students at the college is found to be 21.709 to 25.091 cm
Generally the width of a confidence interval is dependent on the margin of error.
Generally the margin of error is mathematically represented as  
       
From the above equation we see that 
            
 
Here   is the critical value of the half of the level of significance and this value  increase as the confidence level increase
  is the critical value of the half of the level of significance and this value  increase as the confidence level increase
Now if a  99% confidence level is  used , it then means that the value of  
   will increase, this in turn will increase  the margin of error and in turn this will increase the width of the confidence interval
  will increase, this in turn will increase  the margin of error and in turn this will increase the width of the confidence interval 
Hence a 99% confidence interval  will be wider than a 95% confidence interval 
 
        
             
        
        
        
She is wrong she should have added 18 to both sides
        
             
        
        
        
Answer:
   20°
Step-by-step explanation:
Rotating the figure through an angle equal to the central angle of one "sector" will do the required mapping. That is 360°/18 = 20°.
 
        
             
        
        
        
Answer:
x2 + 12x + 4x + 48
Step-by-step explanation:
i just took the assignment
 
        
             
        
        
        
I am so sorry for giving you the wrong answer at first.
Here's the processs
1x=-0.5555
Move the decimal point in the repeating decimal one space forward 
10x=-5.55555
Then subtract
10x=5.5555
x=-0.5555= 9x=-5
Divide both sides by 9
9x=-5
9x/9=-5/9
-5/9 is your final answer!
Hope this helps!