Plz do both plz plz plz

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

If a suspect is in possession of 20 grams of cocaine how many ounces does he possess what will the charge be

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