Q: The local aquarium has 4 dolphins that each require 3 hours of training daily. The aquarium has 2 trainers and they want to split the hours they spend training the dolphins equally. How many hours will each trainer spend training the dolphins?
A: Training all the dolphins takes 4 * 3 = 12 hours. They want to split the hours equally so each trainer has to train the dolphins for 12 / 2 = 6 hours. The answer is 6.

Q: If 12 bags of oranges weigh 24 pounds, how much do 8 bags weigh?
A: Each bag of oranges weighs 24 pounds / 12 = 2 pounds. 8 bags of oranges would weigh 8 * 2 pounds = 16 pounds. The answer is 16.

Q: Mary bought 5 boxes of drinks at $6 each box and 10 boxes of pizzas at $14 each box for her pizza party. She paid $200 for all the items. How much change did she get back?
A:
Mary spent 5 x $6 = $30 on drinks. She spent 10 x $14 = $140 on pizzas. She spent a total amount of $30 + $140 = $170. Therefore, Mary got a change of $200 - $170 = $30 after paying all the items for her pizza party. The answer is 30.