Why does no one want to answer my questions...

Which equation can be simplified to find the inverse of y = 2x2?

A(t)=728(1+0.04)^t how much money did aditya originally invest

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.)