What is 423x42 can't get it

What is the pattern in the values as the exponents increase?

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

M.xyz =radians. covert this radian measure to its equivalent measure in degrees.