The answer is 0.40 or 0.4
        
                    
             
        
        
        
Answer:
32pi
Radius=1/2 Diameter
radius=2
Area of circle= pi*radius^2= 4pi
4pi*8=32 pi
 
        
                    
             
        
        
        
Answer:
y=–8, x=–1
Step-by-step explanation:
I don't have time to explain 
 
        
             
        
        
        
First, you would create an equation for this problem. 

= 

Next, you would cross multiply. 
15x = 1,800
Now, you would isolate the x. To do this, you would divide both sides by 15. 
x = 
120It is a 120% increase. I hope this helps!