Find dy/dx if x=at⁴, y = at³

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.)

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is