Help me plz 15 points

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).

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4