A light year is defined as the distance light travels in one year. One light year is 9.46 x 1012 kilometers. A galaxy is about 150,000 light years wide. About how
many kilometers wide is the galaxy?
A
1.419 x 1016
B
1.419 x 1017
C
1.419 x 1018
D
1.419 x 1019

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