South americas population in 2000 was 953,000,000. Write this number in scientific notation

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).

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Find an equation for the linear function which has slope -10 and x-intercept -7