Me round to the nearest hundredth and say if it rational or irrational and show work

A). Cubed root of 1,728

Step 1: Make a factor tree.

                      1728                       (I'm sorry if this is hard to visualize)
              12                 144
        6           3       12         12
3            2            4    3     4    3
                         2   2       2   2

⇒  ∛12³ 
⇒ 12 

This answer is a rational number, so it doesn't need to be rounded.