A new car is purchased for 17000 dollars. The value of the car depreciates at 13.5% per year. What will the value of the car be after 12 years

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?