Answer:
3(cos 109° + i sin 109°)
3(cos 229° + i sin 229°)
3(cos 349° + i sin 349°)
Step-by-step explanation:
27(cos 327° + i sin 327°)
Modulus: 27^⅓ = 3
Arguments:
327/3 = 109
(327+360)/3 = 229
(327+2(360))/3 = 347
Cube roots are:
3(cos 109° + i sin 109°)
3(cos 229° + i sin 229°)
3(cos 349° + i sin 349°)
 
        
             
        
        
        
Answer:
1/4
Step-by-step explanation:
a^2 = 1/2^2
1/2^2= 1/4
 
        
                    
             
        
        
        
Answer:
1/2 x
Step-by-step explanation:
 
        
             
        
        
        
That's a description of a cube.
        
                    
             
        
        
        
Answer:
The <em>t</em>-value used for the 95% confidence interval of paired data is 2.776.
Step-by-step explanation:
The confidence interval formula for mean difference for a paired data is as follows:

Here,
 = sample mean of the difference,
 = sample mean of the difference,
 = sample standard deviation of the difference,
 = sample standard deviation of the difference, 
<em>n </em>= sample size (both samples are of same size).
 = critical value of <em>t</em>
 = critical value of <em>t</em>
(<em>n</em> - 1) = degrees of freedom
The information provided is:
<em>n</em> = 5
Confidence level = 95%
The critical value of <em>t</em> is:

                
                
*Use a <em>t</em>-table for the critical value of <em>t</em>.
Thus, the <em>t</em>-value used for the 95% confidence interval of paired data is 2.776.