IT should root very soon..
the top cutting is what many many growers use for clones and it usualy will root with ease
ideally you should have used a rooting hormone, wilt spray and a rooting medium (like rockwool)

If she looks good, keep in the direction you are headed..

you may have a little problem when you transplant her to dirt.. make sure you keep the new roots very moist when you first transplant her.. don't let that dirt dry out..

If need be, TRI- can come to your house and help you.

and now you KNOW
: )