That's what I did and since the zeros would be -5 and 3 the answer would be 3 since it can't be a negative
6 x 100 000,000
4 x 10, 000,000
4 x 100 ,000
9 x 1 ,000
2 x 100
1x 10
hope this is what you require = 640,409,210
The domain would be [6,infinity)
This means the radius is 10 units. For it to be a circle, any point that lies on the circle is the same distance from the moving point to a fixed point (the centre). This distance is the radius.
As such, any other point that lies on the circle is 10 units from the centre as well.
32, 7
0, - 1
20, 4
You just plug in the numbers and solve