Answer:
2 cm
Step-by-step explanation:

 
        
             
        
        
        
H= .6.5
V=<span>πr^2h
h=  v/</span>πr^2 = 2940.5/<span>π*12^2 = 6.49993 = 6.5</span>
        
                    
             
        
        
        
Answer:
(x² -1) + y² = 9
Step-by-step explanation:
diameter=6 so radius means 6/2=3 (thus,radius²=3²=9)
centre (1 and midpoint of diameter is at y=0, so 1,0)
 
        
             
        
        
        
10(x/2 + 8) = 11, expand
10x/2 + 80 = 11
5x/2 = 11-80= -69
5x = -138
x = - 138/5
        
             
        
        
        
2x+3y=160
-2x+7y=25 I hope that helps!!