What multiplied three times get me 1/8?

Please help ASAP

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.)

What is the measure of the smallest angle in the diagram? 15 29 32 45

16x^2-16x=5 solve the equation by completing the square