Were power plants necessary to people use electricity?

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

How will you manage your time to accomplish the necessary tasks both on the job and at home?

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?