Question: Hayden has a tank with a small hole in the bottom. The tank starts with 40 gallons of water. It loses 2 gallons of water per hour. Hayden does not add any water for the first two hours. He adds 1 gallon of water to the tank in hour three. He adds three gallons of water to the tank in the fourth hour. How much water is left in the tank at the end of the fourth hour?
Answer: Over the four hours, the tank loses 2 * 4 = 8 gallons of water. Hayden adds a total of 1 + 3 = 4 gallons of water. At the end of the four hours, there is 40 - 8 + 4 = 36 gallons of water left in the tank. The answer is 36.

Question: Niko has bought 9 pairs of socks that cost $2 each and plans to resell them. He wants to gain 25% profit from four of the pairs of socks and $0.2 profit each for the other 5 pairs of socks. How much will his total profit be?
Answer: Niko will earn $2 x 25 / 100 = $0.5 profit for each of the first four pairs of socks. So, his total profit for the four pairs of socks will be $0.5 x 4 = $2. His total earnings for the 5 pairs of socks is $0.2 x 5 = $1. Therefore, his total profit will be $2 + $1 = $3. The answer is 3.

Question: Lilith originally had five dozen water bottles that she needed to sell at $2 each to get exactly enough money to buy her friend a birthday gift. However, at the store, Lilith realized she could not sell at $2 because the regular price was $1.85 per water bottle in her town, and she had to reduce her price to $1.85 as well to sell her water bottles. Calculate the total amount of money Lilith will have to find to buy her friend the birthday gift after selling her water bottles at the reduced cost.
Answer: Lilith had 5 dozen water bottles, and since a dozen has 12 water bottles, the total number of water bottles she had was 12 bottles / dozen * 5 dozen = 60 bottles. To buy her friend the birthday gift, Lilith originally had to sell her water bottles for a total of 60 bottles * $2 / bottle = $120. When she reduced the price to $1.85 to meet the regular price, the total amount of money she had from the sales was $1.85 / bottle * 60 bottles = $111. To buy her friend the birthday gift, Lilith has to find $120 - $111 = $9 more. The answer is 9.

Question: Jackson wants to start saving for the vacation that he’s taking next August, 15 months away. He wants to save $3,000.00. If he gets paid 2 times a month how much money does he need to set aside, per paycheck, to have enough money saved for his vacation?
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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He has 15 months to save $3,000.00 so that’s 3000 / 15 = $200.00 a month. He gets paid twice a month so he needs to save 200 / 2 = $100.00 from each paycheck. The answer is 100.