Gertrude tells King Claudius that Hamlet murdered Polonius cold blooded with his rapier because Hamlet heard somebody behide the curtain when they were talking and "kills the unseen good old man".
Rosencrantz and Guildenstern seek for Hamlet and ask him what he has done with the body but Hamlet's response to them was "to be demanded of a sponge" saying that they are being used by the King
King Claudius is talking to Hamlet asking him where the body is. Hamlet then responds with "He's at supper". King Claudius then tells Hamlet that He's going to send him to England and Hamlet has no problem with it.