Use traces to sketch and identify the surface 9x^2-y^2+z^2=0

Angle that produces maximum distance

Simplify this expression. 8x 16(x + y)

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