Rotate the given triangle 270° counterclockwise about the origin

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.

Which equation can be used to determine the reference angle, r, if 0=7 pi/12?

What is the inverse of the function below? f(x)=x/3-2