Question: Stefan goes to a restaurant to eat dinner with his family. They order an appetizer that costs $10 and 4 entrees that are $20 each. If they tip 20% of the total for the waiter, what is the total amount of money that they spend at the restaurant?
Answer: Step-by-step reasoning process: The total cost of the entrees is 4 * $20 = $80. The total cost of the dinner is $80 + $10 = $90. The tip is $90 * 0.20 = $18. The total cost with tip is $90 + $18 = $108.
So the answer is 108.

Question: Sadie, Ariana and Sarah are running a relay race. Each part of the race is a different length and covers different terrain. It takes Sadie 2 hours to run through the forest at an average speed of 3 miles per hour. Ariana sprints across the open field on her section at 6 miles per hour for half an hour. If Sarah runs along the beach at four miles per hour and their total time for the race is four and half hours, what is the total distance of the race?
Answer: Step-by-step reasoning process: Sadie ran for 3 miles / hour * 2 hour = 6 miles. Ariana covered a distance of 6 miles / hour * (1 / 2) hour = 3 miles. Sarah ran for 4.5 hours – 2 hours – 0.5 hours = 2 hours. In this time, Sarah traveled a distance of 4 miles / hour * 2 hours = 8 miles. The total distance for the race was 6 miles + 3 miles + 8 miles = 17 miles.
So the answer is 17.

Question: The white rabbit can hop 15 meters in one minute. The brown rabbit hops 12 meters per minute. What is the total distance the two rabbits will hop in 5 minutes?
Answer: Step-by-step reasoning process: White rabbit + brown rabbit = 15 + 12 = 27. 5 minutes * 27 = 135 meters. The two rabbits will hop 135 meters in 5 minutes.
So the answer is 135.

Question: Betty has 20 books, and her sister has 1/4 times more books than Betty. What's the total number of books the two have?
Answer:
Step-by-step reasoning process: Betty's sister has 1 / 4 * 20 books = 5 more books. The total number of books Betty's sister has is 20 books + 5 books = 25 books. The total number of books the two have is 25 books + 20 books = 45 books.
So the answer is 45.