Which of the following expressions represents 24c12?
a) 12! /24!
b 24! /24!
c) 24! / 12! •12!
d) 24! /12!

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.

Just tell me how to set up the equation.

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