Help please! I’ll mark as brilliant!

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 the area of the regular hexagon if a side is 20 cm.

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?