I think that is arithmetic i not totally sure
        
             
        
        
        
Answer:
C. Centroid
Step-by-step explanation:
The circumcenter is the center of a triangle's circumcircle (circumscribed circle over triangle). It can be found as the intersection of the perpendicular bisectors.
The incenter is the center of the incircle (inscribed circle into a triangle) of a triangle. The incenter can be constructed as the intersection of angle bisectors. 
Centroid is the point where the three medians of the triangle intersect. 
The intersection of the three altitudes of a triangle is called the orthocenter. 
Since three medians intersect at point which divides each median into 2:1 ratio, the answer is centroid.
 
        
                    
             
        
        
        
Answer:
t(x) = 450 - 0.06x
Step-by-step explanation:
 
        
             
        
        
        
Answer:4^2≈50.26548
 
Step-by-step explanation:
    πr2.
    Where r is the radius and π≈3.14 , the ratio of a circle's circumference to    its diameter.
    Plugging in 4 from the radius, we get.
    42π
    ⇒16π inches.
    This is our exact answer. Alternatively, we can plug in 3.14 for π to get.
    50.26 inches.
 
        
             
        
        
        
Answer:
Grade B score:
 
    
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 73.3
Standard Deviation, σ = 9.7
We are given that the distribution of score on test is a bell shaped distribution that is a normal distribution.
Formula:

B: Scores below the top 5% and above the bottom 62%
We have to find the value of x such that the probability is 0.62
 
  
 
  
 
  
Calculation the value from standard normal z table, we have,  
 
  
We have to find the value of x such that the probability is 0.05

Calculation the value from standard normal z table, we have,  
 
  
Thus, the numerical value of score to achieve grade B is
