Calculate the perimeter of the figure and please show how you solved the answer :)

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

Ill mark the brainliest if you me with the these three questions 7,8,9

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585