The Parker family needs to leave the house by 5 pm for a dinner party. Mrs. Parker was waiting to get into the bathroom at 2:30 pm. Her oldest daughter used the bathroom for 45 minutes and her youngest daughter used the bathroom for another 30 minutes. Then her husband used it for 20 minutes. How much time will Mrs. Parker have to use the bathroom to leave on time? Give the rationale and then the answer.
Let's think step by step. Between 2:30 pm and 5:00 pm, there are 2.5 hours. There are 60 minutes in an hour, so 2.5 hours x 60 = 150 minutes. Her family was in the bathroom 45 + 30 + 20 = 95 minutes. Mrs. Parker has 150 minutes – 95 minutes = 55 minutes in the bathroom.. The answer is: 55.

Wally gives 3/4 of his 400 tickets to his two friends Jensen and Finley, who share the tickets in a ratio of 4:11. How many tickets does Finley get? Give the rationale and then the answer.
Let's think step by step. Wally gives his friends 3 / 4 * 400 = 300 tickets to share. The total ratio that represents the tickets that Jensen and Finley share is 4 + 11 = 15. From the total ratio, the fraction that represents the share that Finley got is 11 / 15, and since he shared with Jensen 300 tickets, he got 11 / 15 * 300 = 220 tickets.. The answer is: 220.

Jasmine wants to organize her books in order of most number of pages to least number of pages. Jasmine's longest book has 396 pages and her shortest book has one-fourth as many pages as the longest. If the book in the middle of her shelf has three times the number of pages of the shortest book, then how many pages does the middle book have? Give the rationale and then the answer.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Let's think step by step. Jasmine's shortest book is 1 / 4 * 396 pages = 99 pages long. The middle book is 3 * 99 pages = 297 pages long.. The answer is: 297.