Answer:
r = 
r = 17.2 cm
Step-by-step explanation:
∵ The area of the circle A = πr²
∴ r² = A/π
∴ r = √(A/π)
∵ A = 54 cm²
∵ π = 22/7
∴ r = √(54/(22/7)) = √(54×7/22) = 17.2 cm
 
        
             
        
        
        
Answer:
the answer is c h2=k2=120%
Step-by-step explanation:
 
        
             
        
        
        
The correct answer to this question is B.
        
             
        
        
        
Answer:
Step-by-step explanation:
-(-)=+
so  -8-(-3)=-8+3
=-5