Mr. Yee, a professor at a local university, decides to use observation. He rides in the car with 20 city residents. He notes if he sees the driver texting while driving (a) Provide an advantage of using observation. (b) Provide a disadvantage of using observation. (c) What are the sample and population for Mr. Yee’s research? (d) Suppose 3 of the 20 drivers texted during the observation. What conclusion might Mr. Yee make about the percent of people in the city who text while driving?

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.