Answer:
n=1705
Step-by-step explanation:
The margin of error is the range of values below and above the sample statistic in a confidence interval.  
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  
Assuming the X follows a normal distribution  
 
  
And the distribution for  is:
 is:
 
  
We know that the margin of error for a confidence interval is given by:  
 (1)
   (1)  
The next step would be find the value of  ,
,  and
 and  
  
Using the normal standard table, excel or a calculator we see that:  
 
  
If we solve for n from formula (1) we got:  
 
  
 
  
And we have everything to replace into the formula:  
 
  
And if we round up the answer we see that the value of n to ensure the margin of error required  mm is n=1705.
 mm is n=1705.  
 
        
             
        
        
        
Answer: The manager sold the book shelf at $235.2
Step-by-step explanation:
Since we have given that 
Wholesale price of the book shelf = $147.00
But Gabriela's Furniture Store marks up all furniture by 60%.
So, Mark up value is given by

So, the new price that the manager sold the book shelf is given by

Hence, the manager sold the book shelf at $235.2
 
        
             
        
        
        
Answer:
8x + 14
Step-by-step explanation:
12x - 4x + 3 + 11 <em>(</em><em>Subtract</em><em> </em><em>12x</em><em> </em><em>-</em><em> </em><em>4x</em><em>)</em>
8x + 3 + 11<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>(</em><em>Add</em><em> </em><em>3</em><em> </em><em>+</em><em> </em><em>1</em><em>1</em><em>)</em>
8x + 14
Tip: the like-terms 12x and 4x can be subtracted like regular numbers because they have the same variable and exponent.
 
        
             
        
        
        
7b is just 7 x b and if b is 6 its just 7 x 6
which the answer is 42
        
                    
             
        
        
        
Answer:
It's okay the first answer is right, $0.15
The store makes $4.20 off the rope
Step-by-step explanation: