1.If I have the equation (x+4)squared + (y+4)squared = 9

The center of the circle would be (-4,-4) correct?

2. If I have an ellipse with the equation (x-20)squared over 1/4 + (y-10)squared over 1/16 (over is the division sign)

The 1/4 is truly the distance of 1/2 and the 1/16 is truly the distance of 1/4 correct?

Is there an easier way to write this equation?

Thanks.