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➷ Standard deviation = 
Substitute the values in:
 = 8.1975...
 = 8.1975...
This can be rounded to give an approximate answer of 8.2
The answer is option A. 
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Answer:
10.85
Step-by-step explanation:
hope its right :)
 
        
             
        
        
        
The only that has the shape of the one below.
y = -4(x^3 + 7x^2+8x - 16)
Let x = 1
y = - 4(1 + 7 + 8 - 16)
y = 0
y = -4(x -1)(x^2 + 8x + 16)
y = -4(x - 1)(x + 4)^2
 
        
        
        
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