Help answer this for me it will help i will give u extra points

Which graph represents the following piecewise defined function?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

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