Answer:
Read Explanation
Step-by-step explanation:
A standard devation of 15 means 68% of the norm group has scored between 85 (100 – 15) and 115 (100 + 15). In other words, 68% of the norm group has a score within one standard deviation of the average (100). Also, 95% of the norm group has an IQ score within two standard deviations of the average.
 
        
             
        
        
        
It will travel 7.5 cm a revolution and 7.5 x 3 wound = your answer i believe
lol i hate geomatry
        
             
        
        
        
Answer:
Step-by-step explanation:
i think it is 2
 
        
                    
             
        
        
        
Answer:
Part 1) 
Part 2) 
Step-by-step explanation:
Part 1) what is the measure of angle AFE
we know that
The measure of the interior angle is the semisum of the arches that comprise it and its opposite.
<u>Note:</u> In this problem the correct measure of arc EA is 40 degrees (see the picture)
so

substitute the given values

Part 2) what is the measure of angle  EFB?
we know that
 ---> by supplementary angles (form a linear pair)
so 
substitute the given value

