32 minus what equals = 67

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).

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

Complete the equation of the live through (-1,6) (7,-2)