Ineed somebody me with my homework. and how you get the answer and explain me

I cant see what the numbers are but to find a cube, you do the number times itself 3 times example: 3 x 3 x 3 = 27. For cubing you do the number times itself twice for example 3 x 3 = 9. 

I can see the square root though. 
G: 36 = 6  64 = 8  81 = 9  25 = 5  324 = 18  529 = 23

The rest you should be able to understand with the explaining. Square root is finding what multiplied by itself is that number. Cube root is what times itself 3 times is that number. Hope this helps.