Mikhael and hema want to hire a professional dj to play music during the event. dj kay-cee charges $100 plus $50 per hour . dj fab fred charges $150 plus $30 per hour write an equation to find the number of hours at which dj kay-cee and dj fab fred would charge the same amount

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