Answer:
Mean: 30 students
Standard deviation: 5.2 students
Step-by-step explanation:
Khan
 
        
             
        
        
        
Answer:
5/2x
(5 divided by 2 times (twice) a number)
("x" is considered as the unknown number)
Hope this helps 
:)
 
        
                    
             
        
        
        
The answer to this question is true. Based on my knowledge and research, the deviation is, in fact, the difference between any value and the mean of the entire set.
        
             
        
        
        
Answer:
Part 1) The length of two sides and the measure of the included angle (Side-Angle-Side)
Part 2)  
  
Part 3) 
Step-by-step explanation:
we have
In the triangle ABC

Part 1) Which information about the triangle is given?
In this problem we have the length of two sides and the measure of the included angle (Side-Angle-Side)
see the attached figure to better understand the problem
Part 2) Which formula can you use ti find b? 
I can use the law of cosines
 
  
we have

substitute the given values

 
   

Part 3) What is b, rounded to the nearest tenth?
Remember that
To Round a number
a) Decide which is the last digit to keep  
b) Leave it the same if the next digit is less than  (this is called rounding down)
 (this is called rounding down)  
c) But increase it by   if the next digit is
 if the next digit is   or more (this is called rounding up)
 or more (this is called rounding up)
In this problem we have
 
We want to keep the digit  
The next digit is  which is 5 or more, so increase the "5" by 1 to "6"
 which is 5 or more, so increase the "5" by 1 to "6"
therefore
