[9.7] - Reading Assignment

After reading section 9.7...

1. State a reason for introducing different coordinate systems for 3 dimensional space, or give an example in which using some different system is much *easier* than using Cartesian coordinates.
2. Describe the surface (in 3 dimensions, in cylindrical coordinates) given by the equation $\rho = 3$.
3. Muddy questions? Questions you wonder about?