Im desperate so I made this 25 points!! Please help! A bat chasing a moth emits a sequence of three chirps every 0.010 seconds and
later hears the echos of the chirps as detailed in the diagram shown.

Question: How far away is the moth when the bat hears the third echo?
Make sure to explain how you arrived at your answer.

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.