[Question]Don can paint 3 tiles a minute, Ken can paint 2 more tiles a minute than Don and Laura can paint twice as many tiles as Ken. Kim can paint 3 fewer tiles than Laura can in a minute. How many tiles can Don, Ken, Laura and Kim paint in 15 minutes?
[Answer]Ken paints 3 tiles / minute + 2 tiles / minute = 5 tiles / minute. Laura can paint 5 tiles / minute x 2 = 10 tiles / minute. Kim can paint 10 tiles / minute - 3 tiles / minute = 7 tiles / minute. All 4 can paint 3 tiles / minute + 5 tiles / minute + 10 tiles / minute + 7 tiles / minute = 25 tiles / minute. In 15 minutes, they can paint 15 minutes x 25 tiles / minute = 375 tiles. The answer is 375.
Q: Mr. Finnegan has 3 tanks with a capacity of 7000 gallons, 5000 gallons, and 3000 gallons, respectively. If he fills the first tank up to 3/4 full, the second tank with water up to 4/5 of its capacity, and the third tank up to half of its capacity, how many gallons in total are in the tanks?
A: The capacity of the first tank is 7000 gallons, and if it is filled up to 3 / 4 full, it carries 3 / 4 * 7000 = 5250 gallons. When the second tank is filled up to 4 / 5 of its capacity, it carries 4 / 5 * 5000 = 4000 gallons. The total amount of water in the first two tanks is 5250 + 4000 = 9250 gallons. If Mr. Finnegan fills the third tank with water up to half its capacity, the tank fills up with 1 / 2 * 3000 = 1500 gallons. In total, the three tanks have 9350 + 1500 = 10850 gallons of water. The answer is 10850.
Question: Mitch is baking a cake and needs 3 cups of flour and two cups of sugar. He doesn't have a one cup scoop, only a 1/3 cup scoop. How many total scoops will he need?
Answer: He needs 9 scoops of flour because 3 / (1 / 3) = 9. He needs 6 scoops of sugar because 2 / (1 / 3) = 6. He needs 15 total scoops because 9 + 6 = 15. The answer is 15.
[Question]After a trip, Mrs. Nalani took the students to the restaurant and told them they could order either a burger or a hot dog. If the number of students who ordered burgers was 30, twice the number of students who called for a hot dog, calculate the number of students at the restaurant.
[Answer]If the 30 students who ordered burgers were twice the number of students who ordered hot dogs, then 30 / 2 = 15 students ordered hot dogs. The total number of students is 15 + 30 = 45. The answer is 45.
Q: Alvin is 30 years old and Simon is 5 years away from being 1/2 the age of Alvin. How old is Simon?
A: 1 / 2 the age of Alvin who is 30 is 30 / 2 = 15. Simon is 5 years away from being half the age of Alvin so Simon is 15 - 5 = 10 years old. The answer is 10.
Question: Bryce is bringing in doughnuts for his class. There are 25 students in his class, 10 kids want chocolate doughnuts and 15 want glazed doughnuts. The chocolate doughnuts cost $2 each and the glazed doughnuts cost $1 each. How much is the total cost for doughnuts?
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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The chocolate doughnuts cost 10 * $2 = $20. The glazed doughnuts cost 15 * $1 = $15. The total cost for the doughnuts is $20 + $15 = $35. The answer is 35.