D is the answer 
40050 divided by 3.14 is 12754.77707
        
             
        
        
        
The estimated probability would be 0.1... I had this test yesterday. hope this helps
        
             
        
        
        
Answer:
 C. both student 1 and student 2
Step-by-step explanation:
Dilation does not change any angles, so the triangles are similar and the trig functions of corresponding angles will be identical. 
The slope of CB is -1/3 and the slope of BA is 3, so they multiply together to give -1. That means the segments are at right angles and the triangle is a right triangle.
Both the premise and the conclusion of each student is correct.
 
        
             
        
        
        
ANSWER
C) (6,-8)
EXPLANATION
The equations are:

and

We substitute the first equation into the second equation to get:

We multiply through by 3 to get:

Group similar terms,


Divide both sides by 7 to get,

Put this value of x into the first equation to get;

