What is 4c times 28? and how do you do that

Can someone me with these two circle theorem questions asap?

Given the graphed function below which of the following orders pairs are found on the inverse function

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.