Let f(x)=−3x. the graph of f(x) is transformed into the graph of g(x) by a vertical stretch of 4 units and a translation of 4 units right. what is the equation for g(x)?

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).

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

How do i do this? i don’t understand