Solve for x.
3x = 2/5

A) 1/4
B) 2/15
C) 5/6
D) 6/5

Find the given elements if matrix 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).

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.