The angle adjacent to angle 6 is the one we need to find first.  To do this, add the measures of the intercepted arcs and divide by 2.  60 + 50 = 110, and half of that is 55.  That means that both adjacent angles to the angle 6 are 55 (vertical angles are congruent).  The measure of all the angles added together is 360 and angle 6 is vertical to the other "sideways" angle, so they are congruent as well.  360 - 55 - 55 = 250.  Split that up between angle 6 and its vertical angle to get that each of those measure 125.  Angle 6 measures 125, choice b from above.
        
             
        
        
        
Answer:

Step-by-step explanation:
Given

 -- City C
 -- City C
 --- City K
 --- City K
Required
Determine the 90% confidence interval
This is calculated using:

Calculating 




For a 90% confidence level, the z-score is 1.65.  So:

Calculating the standard deviation 

So:


So:


 
        
             
        
        
        
The zeroes are -1/2 and -2
last option
        
             
        
        
        
You solve for y and get 
y=3/4x-5
Slope is 3/4
Y intercept is -5
        
                    
             
        
        
        
31 rotations, hope i was a big help to you