3x + 4(x + 1) when x = 4​

What is the average rate of change for this function for the interval from x=2 to x=4 ?

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.)

To determine the number of deer in a forest a forest ranger tags 280 and releases them back