Answer:
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One pound is about 0.5, so pretty much divide it by half
        
             
        
        
        
Answer:
Doodoo
Step-by-step explanation:
doodoo
 
        
             
        
        
        
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>