Answer:
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Step-by-step explanation:
 
        
                    
             
        
        
        
True - since the outlier is way off it will cause your average to mess up which is why we test multiple times to make sure we are more accurate with our numbers
        
                    
             
        
        
        
Ok so area=pir^2
2 circles with same area=2pir^2
circle with 2 times radius=pi(2r)^2=pi4r^2=4pir^2
is 2 circles with same area equal to circle with 2 times radius?
is 2pir^2=4pir^2?
is 2=4?
no 
therfor the answer is no
it is because the radius is squaered so the doubled gets doubled makng it quadrupuled when the first one only gets doubled
        
             
        
        
        
Answer: Yes!
Step-by-step explanation:
You correctly answered!
 
        
             
        
        
        
Here is the answer
I did it with steps
3a+2(4a-1)=9
 3a+8a-2=9
 11a=11
 a=1