[Question]John plays at the arcade for 3 hours. He uses $.50 for every 6 minutes. How much money did he spend, in dollars?
[Answer]He was at the arcade for 3 * 60 = 180 minutes. So he put coins in 180 / 6 = 30 times. That means he spent 30 * .5 = $15. The answer is 15.

[Question]A parking garage of a mall is four stories tall. On the first level, there are 90 parking spaces. The second level has 8 more parking spaces than on the first level, and there are 12 more available parking spaces on the third level than on the second level. The fourth level has 9 fewer parking spaces than the third level. If 100 cars are already parked, how many cars can be accommodated by the parking garage?
[Answer]The second level has 90 + 8 = 98 parking spaces. The third level has 98 + 12 = 110 parking spaces. The fourth level has 110 - 9 = 101 parking spaces. So the parking garage can accommodate 90 + 98 + 110 + 101 = 399 cars. Thus, the parking garage can still accommodate 399 - 100 = 299 cars. The answer is 299.

[Question]Mirasol had $50 in her account. She spent $10 on coffee beans and $30 on a tumbler. How much is left in her account?
[Answer]Mirasol spent a total of $30 + $10 = $40. Thus, Mirasol has $50 - $40 = $10 left in her account. The answer is 10.

[Question]Kathleen receives a weekly allowance for completing all of her chores. During middle school, her allowance was $2 more than $8 but during her senior year, her allowance was $5 more than twice her middle school allowance. What is the percentage increase in Kathleen's weekly allowance?
[Answer]
Kathleen's allowance in middle school was $8 + $2 = $10. Twice her middle school allowance is $10 x 2 = $20. So, Kathleen's senior year allowance is $20 + $5 = $25. Her allowance increased by $25 - $10 = $15. Kathleen's percent increase in her weekly allowance is $15 / $10 x 100% = 150%. The answer is 150.