Answer:
y: 139 x: 139 too
Step-by-step explanation:
 
        
                    
             
        
        
        
It would be D)
Hope this helps
        
             
        
        
        
It must be 6 since the length sides r doubled and it's similar
        
             
        
        
        
168cm2
Let r cm be the radius of the balloon, then 
<span>2pi(r)=23=>r=23/(2pi) </span>
<span>The surface area= </span>
<span>4pi(r^2)= </span>
<span>4pi[23/2pi)]^2= </span>
<span>(23^2)/pi=168.386 cm^2 </span>
<span>approximately.</span>
        
             
        
        
        
Answer:
C
Step-by-step explanation:
A =  r²
r²
so we do 
5² = 25 * 
25 * 
= 78.5 square units