The answer is 5 because 5-2=3. S=5
        
                    
             
        
        
        
I don't know if we can find the foci of this ellipse, but we can find the centre and the vertices. First of all, let us state the standard equation of an ellipse. 
(If there is a way to solve for the foci of this ellipse, please let me know! I am learning this stuff currently.) 

Where 

 is the centre of the ellipse. Just by looking at your equation right away, we can tell that the centre of the ellipse is: 

Now to find the vertices, we must first remember that the vertices of an ellipse are on the major axis. 
The major axis in this case is that of the y-axis. In other words, 
 
 So we know that b=5 from your equation given. The vertices are 5 away from the centre, so we find that the vertices of your ellipse are: 

 & 

I really hope this helped you! (Partially because I spent a lot of time on this lol) 
Sincerely,
~Cam943, Junior Moderator
 
        
        
        
Answer:
(4, 9) and (-10, -8)
Step-by-step explanation:
 
        
             
        
        
        
Answer:
$47.50
Step-by-step explanation:
You just take $380 and divide it by 8 hours to get the amount of money per hour, which is $47.50 .