What is the constant of proportionality, and what does it mean in this situation

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.)

How is working backward similar to solving an equation?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm