Determine the axis of symmetry for the function f(x) = −2(x + 3)2 − 5. x = 3 x = −3 x = 5 x = −5

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