Suilin needed 7 dollars 13 cents to buy a book. in her wallet, she found 3 dollar bill , 4 dimes ,and 14 pennies. how much more money do suilin need to buy the book

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?