Samuel orders four dvds from an online music store. each dvd costs $9.40. he has a 25% discount code, and sales tax is 6.5%. round sales tax amounts to the nearest cent. what is the total cost of his order?

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected