This Is my question ​

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.