[Question]Mona bikes 30 miles each week to stay fit. This week, she biked on Monday, Wednesday, and Saturday. On Wednesday, she biked 12 miles. On Saturday, she biked twice as far as on Monday. How many miles did she bike on Monday?
[Answer]Let M be the number of miles Mona biked on Monday. Thus, Mona biked 2M miles on Saturday. In all, Mona biked M + 2M + 12 = 30 miles. Thus, on Monday and Saturday, she biked M + 2M = 3M = 30 - 12 = 18 miles. Therefore, on Monday, Mona biked M = 18 / 3 = 6 miles. The answer is 6.
Q: Nathan planted 5 strawberry plants and 7 tomato plants. He harvested 14 strawberries from each plant and 16 tomatoes from each plant. He then distributed the strawberries and tomatoes into baskets of 7. He sold a basket of strawberries for $9 and a basket of tomatoes for $6. How much money does Nathan make from his harvest?
A: Nathan harvested a total of 5 x 14 = 70 strawberries. He harvested a total of 7 x 16 = 112 tomatoes. He was able to fill 70 / 7 = 10 baskets with strawberries. He was able to fill 112 / 7 = 16 baskets with tomatoes. He made 10 x $9 = $90 from the strawberries. He made 16 x $ 6 = $96 from the tomatoes. All together, he made $90 + $96 = $186 from his harvest. The answer is 186.
Question: Tom and Tim both brought 4, six-sided dice to school. How many total sides are there?
Answer: There are 8 total dice because 4 plus 4 equals 8. There are 48 sides because 8 times six equals 48. The answer is 48.
[Question]At the supermarket, the price paid for oranges is proportional to the mass purchased. Annie paid $6 for 2 kg of oranges. How much will Annie pay for 12 kg of oranges?
[Answer]The price of 1 kg of oranges is $6 / 2 kg = $3 / kg. So Ali will pay 12 kg * $3 / kg = $36 for 12 kg of oranges. The answer is 36.
Q: Quinn catches twice the amount of frogs as Alster who caught 2. Bret catches three times the amount of frogs as Quinn. How many frogs did Bret catch?
A: Quinn catches twice the amount as Alster, who caught 2 frogs so Quinn caught 2 * 2 = 4 frogs. Bret catches three times the amount as Quinn who caught 4 frogs so Bret caught 3 * 4 = 12 frogs. The answer is 12.
Question: When Matty was born, the cost of a ticket to Mars was $1,000,000. The cost is halved every 10 years. How much will a ticket cost when Matty is 30?
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.
user
First find the total number of times the cost is halved: 30 years / 10 years / halving = 3 halvings. Then halve the cost once: $1,000,000 / 2 = $500,000. Then halve the cost a second time: $500,000 / 2 = $250,000. Then halve the cost a third time: $250,000 / 2 = $125,000. The answer is 125000.