Tomorrow joelle wants to travel a total of 4 miles by walking and running. she plans to run for 20 minutes at a rate of 6 miles per hour. how many minutes should she's walk at a rate of 3 miles per hour to finish traveling the 4 miles?

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.)

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.