Lisa was going to visit her grandmother's house. she left her home at 6: 54 am and didn't arrive until 11: 49 am. how much time passed between when she left and when she arrived?

Use the grouping method to factor x^3+ x^2 + 3x +3

49xy +34y - 72z. determine the degree of the polynomial

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).