Estimate first.. Then give the exact difference. 8.3-2.7=?

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?

Find the distance between the point (-3,-4), and (see the picture below)

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