Find the exact value of tan a in simplest radical form

Find the distance between the pair of points a(-1,8) and b(-8,4)

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

Can you divide 25 into 4 equal groups? explain why or why not.