Find the measure of the arc indicated. Assume the lines which appear to be diameters are actual diameters

) mRS
S
R
137

A) 80°
C) 43°
B) 55°
D) 56°

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30