Moving to another question will save this response. Question 18 Which one of the following is an ordinary annuity? $75 paid at the beginning of each monthly period for 50 years $15 paid at the end of each monthly period for an infinite period of time $40 paid quarterly for 5 years, starting today $50 paid every year for ten years, starting today $25 paid weekly for 1 year, starting one week from today Moving to another question wil save this response >