What is the missing numbers in this sequence 245,

Find the distance between c and d on the number line c=3 and d=11

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i

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