I need to know what does 5/n = 16/32 for A 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.)

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

Is the square root of 4 plus the square root of 16 rational?