Sources vary. I've heard 6km, 8km, and 18km.
I have 2 sources that agree on 19000m so KiddCold gets the point.
21) What docking bay was the Millennium Falcon in at Mos Eisley?
I don't have a definite number, but I know of four: Oola, the Twi-lek dancer, Luke, the Gammorean who fell in with Luke, and Bidlo Kwerve
Remember this is a non-EU quiz, I don't remember seeing Jabba drop any more then 3 in the film (Oola, Luke and the Gammorean) I'll give you the point for that though.
23) What were the last words spoken at the end of The Empire Strikes Back?