Help! An advanced question, I need smart people.

gl!

What is the radical expression that is equivalent to the expression 27 1 over 5?

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.

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