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
There were 32 volunteers to donate blood. unfortunately, nn of the volunteers did not meet the health requirements, so they couldn't donate. the rest of the volunteers donated 470 milliliters each.