Answer: 41
When David tells Jennifer that Falken is dead, she states, as she watches video footage of Falken, that he "wasn't very old." David says, "Oh, he was old. He was forty-one." "Oh," says Jennifer. "That's old."
Falken, of course, is not dead at all -- his "death" was arranged by the United States Department of Defense at his request, in order to give him some peace, presumably.