If you were born n February, 29th, 2000, how old are you in 2020? Will give brainiest to best AND right answer. For extra points, if that's even possible, here's a riddle: I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I? NO GOOGLING.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.