5-2 x^2 = -15 using inverse operations

Simplify. show your work. ( 6x-2 ) ^2 ( 0.5x )^4

Can some one me, i’ve been asking for so long

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).