Expand the function f(x)=(x+5)^3

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).

What is the vertex form of f(x) = x2 + 6x + 3

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm