How did the different beak types first arise in the galapagos finches?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

All ova contain sex chromosomes corresponding to: x y xx xy

Which could be a pathway of food through an ecosystem