Plz tell me if I am correct

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).

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?