Answer:
A=777.54
Step-by-step explanation:
What you do is use the formula which is
a=2pirh+2pir^2.
The radius is half the diameter and the diameter is 15 so you take 15 and divide it by 2 to get 7.5. 
The height is 9 m. 
A=2(3.14)(7.5)(9)+2(3.14)(7.5)^2=777.54 m.
 
        
                    
             
        
        
        
The only numbers I could think of would be 1, 2, and 4 because 4 is greater than 3 (2+1) and four times greater than 1 (2-1)
        
                    
             
        
        
        
 18.0                  1
-  0.4             17.0
_____           - 0.4
------->           ____
                     17.6
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
x° + y° = 180° 
2y° - 0.5x° = 180° 
y° = 108° 
x° = 72° 
 
        
             
        
        
        
Answer:
20.875
Step-by-step explanation:
18+24+17+21+24+16+29+18=167/8=20.875