Which statements are true about function g?

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.

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

What is the best estimate of the length of a football