El Niño is a recurring weather phenomenon that leads to increased ocean temperature in the Pacific, and thus .

a. increases global warming
b. depletes the ozone layer
c. stabilizes world climates
d. increases oceanic productivity
e. increases the incidence of cholera

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?