Answer:
The equation of a vertical ellipse is  
Step-by-step explanation:
Here, given:
Length of major axis:  20
⇒ 2 a  = 20  , or , a = 10
Length of minor axis:  12
⇒ 2 b  = 12  , or , b = 6
Also, center (h,k)  = (6,3)
Now, STANDARD EQUATION OF ELLIPSE :

Now, substituting the values, a, b , h and k in above expression, we get:

or, 
Hence, the equation of a vertical ellipse is  
 
        
             
        
        
        
Answer:
The square root of -100 is 10i
Step-by-step explanation:
 
        
                    
             
        
        
        
A, because you if you try to divide 0 into 15 parts you get 0
        
                    
             
        
        
        
2/5 = y/100
40/100 = y/100
Y=40