INTEREST Suppose you have a credit card debt of $4000. Last month, the bank charged you $40 interest on the debt. The solution of the equation 40= 4000/12r represents the annual interest rate, r, on the credit card. Find the annual interest rate on the credit card.

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).

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

What situation is an example of an observational study