Q: Mary is paying her monthly garbage bill for a month with exactly four weeks. The garbage company charges Mary $10 per trash bin and $5 per recycling bin every week, and Mary has 2 trash bins and 1 recycling bin. They're giving her an 18% discount on the whole bill before fines for being elderly, but also charging her a $20 fine for putting inappropriate items in a recycling bin. How much is Mary's garbage bill?
A: First find how much Mary pays weekly for the trash bins: $10 / trash bin * 2 trash bins = $20. Then add this to the cost of the recycling bin: $20 + $5 = $25. Then multiply the week cost by the number of weeks per month to find the monthly cost: $25 / week * 4 weeks / month = $100 / month. Now calculate Mary's senior discount: 18% * $100 = $18. Now subtract the discount and add the fine to find the total monthly cost: $100 - $18 + $20 = $102. The answer is 102.
Question: Jim reads at a rate of 40 pages an hour. He reads a total of 600 pages per week. He increases his reading speed to 150% of its former speed but reads 4 hours less per week. How many pages does he read a week now?
Answer: He read 600 / 40 = 15 hours per week. So now he reads 15 - 4 = 11 hours per week. She now reads 40 * 1.5 = 60 pages per hour. So she reads 11 * 60 = 660 pages per week. The answer is 660.
[Question]The hospital has 11 doctors and 18 nurses. If 5 doctors and 2 nurses quit, how many doctors and nurses are left?
[Answer]There are 11 doctors - 5 doctors = 6 doctors left. There are 18 nurses - 2 nurses = 16 nurses left. In total there are 6 doctors + 16 nurses = 22 doctors and nurses left. The answer is 22.
Q: Nadia is learning to play the piano. She normally makes 3 mistakes per 40 notes and can play about 60 notes a minute.  If she plays for 8 minutes how many mistakes will she make on average?
A: She plays 480 notes because 8 x 60 = 480. This is 12 blocks of 40 notes because 480 / 40 = 12. She makes 36 mistakes because 12 x 3 = 36. The answer is 36.
Question: Kelly, Brittany, and Buffy went swimming at Salt Rock Lake and held a contest to see who could hold their breath underwater for the longest amount of time. Kelly held her breath underwater for 3 minutes. Brittany held her breath underwater for 20 seconds less time than than Kelly did, and Buffy held her breath underwater for 40 seconds less time than Brittany did. How long, in seconds, did Buffy hold her breath underwater?
Answer: Kelly held her breath for 3 minutes, or 3 * 60 = 180 seconds. Brittany held her breath for 20 seconds less time than Kelly did, or 180 - 20 = 160 seconds. And Buffy held her breath for 40 seconds less time than Brittany did, or for 160 - 40 = 120 seconds. The answer is 120.
Q: Josh wants to build a square sandbox that is 3 ft long, 3 ft wide for his son. He can buy sand in 3 sq ft bags for $4.00 a bag. How much will it cost him to fill up the sandbox?
A:
The sandbox is 3' long, 3' wide so the sq footage of the sandbox is 3 * 3 = 9 sq ft. He needs 9 sq ft of sand to fill the sandbox and he can buy it in 3 sq ft bags so he needs 9 / 3 = 3 bags of sand. The sand costs $4.00 a bag and he needs 3 bags so it will cost him 4 * 3 = $12.00 in sand. The answer is 12.