the salt content in a snack bag of pretzels is normally distributed with a mean of 180 mg and a standard deviation of 15 mg. 84% of bage have a salt content higher than

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels