Use composition to determine if g(x) or h(x) is the inverse of f(x) for the limited domain x ≥ -1.
f(x) =
g(x) = x² - 1
h(x) = x² + 1

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