What is 300,000,0000 times 500,000,0000

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).

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

Sketch one cycle if the cosine function y=2cos2theta