Can somebody who knows how to do this plz help answer these questions correctly (only if u done this before) thx :3 WILL MARK BRAINLEST WHOEVER ANSWERS FIRST :D

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b