[Question]A storm dropped 5 inches of rain in the first thirty minutes. In the next 30 minutes, the hurricane dropped half that amount of rain. It then dropped 1/2 inch of rain for the next hour. What was the average rainfall total for the duration of the storm?
[Answer]The storm dropped 5 inches then half that amount so 5 / 2 = 2.5 inches. The next hour the storm dropped 1 / 2 inch of rain for 1 hour so 1 * .5 = .5 inches. All total the storm dropped 5 inches + 2.5 inches + .5 inch for = 8 inches. It rained for 2 hours total so 8 / 2 = 4 inches of rain per hour. The answer is 4.

[Question]Sara got her first paycheck of two weeks of work. She had worked 40 hours a week at $11.50 per hour. The first thing she did was buy a new set of tires for her car for $410. How much money was she left with?
[Answer]Sara worked 40 * 2 = 80 hours over two weeks. She earned 11.50 * 80 = $920. After buying new tires, she had $920 - 410 = $510 left. The answer is 510.

[Question]A boat is traveling across a square lake at 10 MPH. It takes 2 hours to go across the length of the lake. It then travels the whole width of the lake at the same speed, which takes 30 minutes. How many square miles is the lake?
[Answer]The lake is 20 miles across because 2 x 10 = 20. If takes .5 hours to go from bottom to top because 30 / 60 = .5. The lake is five miles from bottom to top because 10 x .5 = 5. The square mileage is 100 because 20 x 5 = 100. The answer is 100.

[Question]Janice opened an art book that she had found in the library and found 5 drawings on the first page. After opening the first ten pages, she realized that the number of drawings on each page increased by five after every page. How many drawings were in the first five pages?
[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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If the first page had 5 drawings, and the number of drawings on each page increased by five, the second page had 5 + 5 = 10. The total number of drawings in the first 2 pages is 5 + 10 = 15. On the third page, the number of drawings increased to 10 + 5 = 15. The first three pages have a total of 15 + 15 = 30 drawings. The fourth page had 15 + 5 = 20 drawings. There are 30 + 20 = 50 drawings on the first four pages. The fifth page also had an extra 5 more drawings than the fourth page, totaling 20 + 5 = 25. For the first five pages, Janice saw 25 + 50 = 75 pages. The answer is 75.