Describe how gases cause the balloon to get bigger

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

Which branches of natural science include the study of an organism that lived 10 million years ago