Answer:
The margin of error (E)  
Step-by-step explanation:
Given, 
  mean 
  standard deviation 
  sample size 

Critical value ![=\frac{z_\alpha}{2}\quad \quad\quad[\because\;\alpha=1-\text{confidence interval}]](https://tex.z-dn.net/?f=%3D%5Cfrac%7Bz_%5Calpha%7D%7B2%7D%5Cquad%20%5Cquad%5Cquad%5B%5Cbecause%5C%3B%5Calpha%3D1-%5Ctext%7Bconfidence%20interval%7D%5D) 
  
                                                 
                                         
Critical value 
                       
                       
The margin of error (E)  
                                        
                                        
Hence, The margin of error (E) 
Complete question is attached in below.
                       
 
        
             
        
        
        
45
15 is a multiple of 3
30 is a multiple of 3
45 is NOT a multiple of 3
60 is a multiple of 3
Ect.
        
             
        
        
        
Answer:
B
Step-by-step explanation:
The  sum of the angles of the triangle add up to 180 degrees.
x and y are equal to each other in this type of the triangle.
 
        
             
        
        
        
<span>8d3 + (6d2 – 4d)
=</span><span>8d3 + 6d2 – 4d
=2d(4d^2 + 3d - 2)
=2d(2d - 1)(d + 2) ...simplify and this is your answer
</span>