Answer:
314 cm ^ 2
Step-by-step explanation:
First do, 3.14 x 20 ^ 2
3.14 x 20 ^ 2 = 1,256
Then do, 1,256/4
1,256/4 = 314 
Why 4?
This part of the circle is 1/4 of the entire circle.
What does ^ mean?
It's just a way to say to the power of on a computer.
Hope this helps! :)
 
        
             
        
        
        
Y=mx+b
5=0(-6)+b
b=5 
So equation 
y=0x+5
Or
y=5
        
             
        
        
        
46.2*(10-2)
10-2=8
46.2*8=369.6
Your answers listed doesnt follow along the order of pemdas. im not sure how those are the answers for that equation. 
        
                    
             
        
        
        
Answer:
-0.3*0.2*12, multiply -0.3 by 0.2 to get -0.06, now multiply 12 by it to get, -0.72.
Step-by-step explanation:
 
        
             
        
        
        
The answer is 7. 
Look at the x=8 and then look up the y-value. 
The graph passes (8,7) so therefore when x = 8 the y is 7