Please answer Number 5 for me and provide an explanation if possible. Willing to give Brainliest and points

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle

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