Witch is grater 67% or 5/9

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

What is the distance between point a and b