Q: In Johnstown, the population is 80 and every single person drives by themselves to work. Each car on a road pollutes 10 pounds of carbon a year. A single bus pollutes 100 pounds of carbon a year. A bus can hold 40 people. The town decides to start running a bus and 25% of the people who used to drive now take the bus. How many fewer pounds of carbon are now emitted per year?
A: The town used to emit 800 pounds of carbon a year because 80 x 10 = 800. 20 now take the bus because 80 x .25 = 20. 60 people still drive because 80 - 20 = 60. Those 60 people create 600 pounds of carbon because 60 x 10 = 600. The town now emits 700 pounds of carbon because 100 + 600 = 700. The town emits 100 fewer pounds of carbon now because 800 - 700 = 100. The answer is 100.
Question: Andrew's father buys a package of 100 masks. Andrew lives with his 2 parents and 2 siblings. All members of Andrew's family change masks every 4 days. How many days will it take to finish the pack of masks?
Answer: Andrew's family consists of 1 + 2 + 2 = 5 people. Each of Andrew's family members uses 100 masks / 5 = 20 masks. With everyone wearing a mask every 4 days, the masks will last 20 masks * 4 days / mask = 80 days. The answer is 80.
[Question]Jack is counting out his register at the end of his shift in the shop. His till has 2 $100 bills, 1 $50 bill, 5 $20 bills, 3 $10 bills, 7 $5 bills, 27 $1 bills, and a certain amount of change in coins. If he is supposed to leave $300 in notes as well as all the coins in the till and turn the rest in to the main office, how much money will he be handing in?
[Answer]Jack's till has 2 * $100 + 1 * $50 + 5 * $20 + 3 * $10 + 7 * $5 + 27 * $1 bills, or $200 + $50 + $100 + $30 + $35 + $27 = $442. He's going to leave $300 in the till and turn the rest in to the office, so he'll be turning in $442 - $300 = $142. The answer is 142.
Q: Pete's memory card can hold 3,000 pictures of 8 megabytes each. How many pictures can it hold of 6 megabytes each?
A: The capacity is 3000 * 8 = 24000. It can hold 24000 / 6 = 4000 6 megabyte pictures. The answer is 4000.
Question: There are 325 students in a local high school. 40 percent of the students have glasses, how many students do not have glasses?
Answer: People that do not have glasses 100% - 40% = 60%. 325(.10) = 32.5. 32.5 * 6 = 195 students. The answer is 195.
Q: There are 4 more Muscovy ducks than Cayugas, and 3 more than twice as many Cayugas as Khaki Campbells. If there are 90 ducks total, how many Muscovies are there?
A:
Let x represent the number of Khaki Campbell ducks. Cayugas:3 + 2x. Muscovies:4 + (3 + 2x) = 7 + 2x. Total: x + 3 + 2x + 7 + 2x = 90. 5x + 10 = 90. 5x = 80. x = 16. Muscovy: 7 + 2(16) = 39. The answer is 39.