What is the area of the composite figure?

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

In the diagram of circle o, what is the measure of zabc?