What is 0.66-02.4 solve

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).

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length