Determine the equation of the circle graphed below.

( help me please )

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.

What are the domain and range of the function f(x)=2^x+1

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents