Surds

[Sarah]

In [mathematics], we often arrive at answers that contain root signs (they may be square roots, cube roots, etc.).
We will find that some of these numbers with a [root] sign are easy to deal with since they have an exact decimal representation
For instance [sqrt]16 = 4, rt^3(8)= = 2, sqrt11.56 = 3.4, rt^5(1/32) = 0.5.
This is because each of these numbers is [rational]