What is the crust beneath the atlantic ocean like

Which muscle is responsible for inhalation ?

This is so important ugh its 25 points

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?