Question

guys i have some math problems im having trouble with, it'd be great if i could get your help, you can just answer the ones you know. im using the ✔ to represent the radical sign.

1. ✔3.24
2. 3✔64
3.3✔8.000
4.-✔121
5.3✔-27
6.+- ✔3.61
7. ✔100 over 225
8. 3✔-1000
9.✔256

i know its a lot but id appreciate the help i can get :)