Please answer the attached question ASAP, Thank you so much<3!

The constant of proportionality is always the where k is the constant of proportionality. additionally, you can find the constant of proportionality by finding the ratio for any point onasap

If you answer 2+2 you will get over 80 points

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.