Afire department spend $900 to purchase a new helmets and gloves the amount included a 6% sales tax what was the price of the equipment to the nearest dollar before tax?

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