The vertex form of the equation of a parabola is y = (x + 3)2 + 53.
what is the standard form of the equation?
a. y = x2 + 53x + 42
b. y = x2 + 6x + 62
c. y = x2 + 3x + 53
d. y = 6x2 + 9x+ 62

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