Answer:
3
Step-by-step explanation:
<em>This is cube root (hence the </em>
).
To find the cube root of a number, we are looking for a number that, when multiplied by itself 3 times, equals the number inside the sign.
So:

We know that
, so this doesn't work.
We also know that
, so this works.
Therefore the cube root of 27 is 3.
Hope this helped!