Answer: 12.56
Step-by-step explanation:
If I remember correctly, the equation for circumference is C=2r*pi (R representing radius). For this problem, if 2 is your radius 2R would equal 4. Take this number and multiply it by 3.14 (pi) to get your final answer. 
 
        
             
        
        
        
Answer:
C
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Correct choice is B
Step-by-step explanation:
Let x% be your final test score, then the average of all test scores is

Since you must have an average between 80% and 89%, then

X is measured in percent, then the greatest value of x can be 100%. You get that

 
        
                    
             
        
        
        
Answer:
x = 88.2
Step-by-step explanation:
The angle at the top of the triangle = 90° - 10° = 80°
and the left side of the triangle is x ( opposite sides of a rectangle )
Using the tangent ratio in the right triangle
tan80° = 
 = 
Multiply both sides by x
x × tan80° = 500 ( divide both sides by tan80° )
x = 
 ≈ 88.2
 
        
             
        
        
        
The answer to A) 700
The answer to B) 250