Multiplying and Dividing Radical Expressions

can someone help me with these problems im going to attach the flies

Question

Multiplying and Dividing Radical Expressions

can someone help me with these problems im going to attach the flies

anonymous · Answer

attachment

anonymous · Answer

the choices 

$$\sqrt{18}$$
$$\sqrt{80}$$
none of the above 
$$\sqrt[4]{5}$$

saifoo.khan · Answer

Luis is helping! :)

anonymous · Answer

no ?

anonymous · Answer

huh ?  cant read that im going to post other one that i dont understand like i understand the steps you just did tell you got to 4 radical 5

anonymous · Answer

okay i see what you saying now did you see the other one i just added how do you slove those problems ?

anonymous · Answer

its a new question i just posted khan is viewing it right now

anonymous · Answer

thanks alot =] !!!!!!!!!!!!!!!!!!!!!!!!!!!!