Natalie read 3/4 of a book that was 120 pages long. how many pages does she have left?

Solve for x by completing the square. 2x^2-4x+7=0

Asap 25 pts brainliest to right best/answer

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).