Bacteria of the genus mycoplasma lack cell walls. what sort of environment do they require for survival?

Variety of living organisms; includes genetic, species, and ecological types.

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?

Can someone me i need the answer and don’t understand?