In any ecosystem the size of a population

What is the average speed of a car that traveled 300.0 miles in 5.5 hours

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?

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?