Please find the square roots of the following complex number.

What is the value of this expression when b= 5 6 (2b-4)

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).

Lines b and c are parallel. what is the measure of angle 6? m6 = 45° m6 = 54° m6 = 117° m6 = 126°