Theos mom bought an eight pack of juice boxes at the store for 4$ what's the unit rate of juice boxes

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.)

Can any one me with the answers to these questions asap?

Which expression is rational? 6. , square root two, square root 14, square root 49