the expression is 27a^3   or (3a)^3
 
        
                    
             
        
        
        
Answer:
6 squared 
Step-by-step explanation:
The square root of a perfect square is a rational number.
 
        
             
        
        
        
Answer:
growth 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
280 cm2
Step-by-step explanation:
1)find the area of square 
A=LW
 =10×10
 =100 
2) find the area of triangle
A=B×H÷2
 =10×9/2
 =45
Coz,there are 4 triangle we multiple by 4
 =45×4
 =180
3)find the total surface area by adding the two
 =100+180
 =280cm2