PLZ, help me with this question.

Triangle xyz has vertices x(1,3), y(0,0)

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.