Answer:
The correct option is D. 81.8%
Step-by-step explanation:
Mean of the data set is given to be 40
⇒ μ = 40
Standard deviation of the data set is given to be 5
⇒ σ = 5
Now we are supposed to find out what percent of the numbers fall between 35 and 50

Now for P(35 < x < 50) :
Substitute x = 35 ⇒ z = -1
Substitute x = 50 ⇒ z = 2
So, P(-1 < z < 2) = P(z < 2) - P(z < -1)
⇒ P(-1 < z < 2) = 0.9772 - 0.1587
⇒ P(-1 < z < 2) = 0.8185
⇒ P(-1 < z < 2) = 81.8%
Therefore, 81.8% percent of the numbers fall between 35 and 50
Hence, The correct option is D. 81.8%
 
        
             
        
        
        
Answer:
False
Step-by-step explanation:
It would form a deformed triangle.
 
        
             
        
        
        
(b-2)(b-2)(b^2+4)
= (b^2-4b+4)(b^2+4)
= b^4-4b^3+8b^2-16b+16
        
             
        
        
        
Answer:
Step-by-step explanation:
Area = pi r^2
r = 7 cm
pi = 3.14
Area = 3.14 * 7^2
Area = 3.14 * 7*7
Area = 153.86
Area = 153.9      rounded.
 
        
             
        
        
        
Answer:8 and 12 
Step-by-step explanation: 8 is 4 less than 12 and 12 and 8 equals 20