Benjamin is planning to go to graduate school in a program that will take three years. Benjamin wants to have $10,000 available each year for his school and living expenses. If he earns 6% on his investments, approximately how much must be deposited at the start of his studies for him to withdraw $10,000 a year for three years

Simon, aged 10, is invited to a classmate's birthday party at an exclusive ski resort on march 15th. the day will include 4 hours of snowboarding, lunch and birthday cake. simon's mother checks a box on the invitation that says "yes, we will attend" and returns it to the classmate's address. unfortunately, they later don't attend the party when simon comes down with the flu. on march 17th, simon's mother receives an invoice in the mail from simon's classmate for $35 that says, "party no-show fee." can simon's classmate collect the fee?