Answer:
.9
Step-by-step explanation:
Step-by-step explanation:

Replace x and y.

Solve for y.

Square both sides.


This is the inverse function or you can also say

39.58 and this is because the radius is half of the diameter so the diameter can be though of as 2r. The formula is C= 2pi r
D= 65 degrees.
Because straight line adds up to 180
So 180-115= 65