Does anyone know the answer to thisss?

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).

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

What is the perimeter of an equilateral triangle if each side is (x+3)?