How do i do the power rule i don't understand

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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.)