[Question]Mark hires a singer for 3 hours at $15 an hour. He then tips the singer 20%. How much did he pay?
[Answer]The cost was 15 * 3 = $45. So the tip was 45 * .2 = $9. So in total, he paid 45 + 9 = $54. The answer is 54.
Q: Jason and Jeremy want to paint their wall white and agreed to split the cost of the paint. A gallon of paint costs $45 and can cover up to 400 square feet. How much will each of them contribute to the cost of the paint if their walls have a total area of 1600 square feet and will need a second coat?
A: They need 1600 square feet / 400 square feet / gallon = 4 gallons of paint for their walls. Since they will do a second coating, then they would need 4 gallons x 2 = 8 gallons in all. Eight gallons of paint will cost $45 / gallon x 8 gallons = $360. Thus, Jason and Jeremy will each contribute $360 / 2 = $180. The answer is 180.
Question: Emily is 20 years old and her older sister, Rachel, is 24 years old. How old is Rachel when Emily is half her age?
Answer: The difference in age between the two sisters is 24 - 20 = 4 years. When Rachel is twice Emily’s age, she is 4 x 2 = 8 years old. The answer is 8.
[Question]In his garden, Grandpa had counted 36 small tomatoes before going on vacation. When he came back from vacation, he counted 100 times more tomatoes. How many tomatoes grew in his absence?
[Answer]Before going on vacation, Grandpa counts 36 tomatoes. After going on vacation, Grandpa has 100 * 36 = 3600 tomatoes. So in his absence, 3600 - 36 = 3564 tomatoes have grown. The answer is 3564.
Q: A washing machine uses 20 gallons of water for a heavy wash, 10 gallons of water for a regular wash, and 2 gallons of water for a light wash per load of laundry. If bleach is used, there is an extra light wash cycle added to rinse the laundry thoroughly. There are two heavy washes, three regular washes, and one light wash to do. Two of the loads need to be bleached. How many gallons of water will be needed?
A: The two heavy washes will use 20 * 2 = 40 gallons of water. The three regular washes will use 10 * 3 = 30 gallons of water. The light wash will use 2 * 1 = 2 gallons of water. The two bleached loads will use an extra 2 * 2 = 4 gallons of water. In all, 40 + 30 + 2 + 4 = 76 gallons of water will be needed. The answer is 76.
Question: Mike and Leo have to print as many pamphlets as possible for a social gathering. Mike manages to print as fast as 600 pamphlets per hour for 9 consecutive hours. After a break, he resumes the task for another 2 hours achieving a third of the speed he was doing before. Leo, on the other hand, only works a third as many hours as Mike did before his break, but was twice as fast as Mike before he took his break. How many pamphlets do both manage to print at the end?
Answer:
Mike printed before the break 600 pamphlets per hour * 9 hours = 5400 pamphlets. The working speed of Mike after the break was 600 pamphlets per hour / 3 = 200 pamphlets per hour. Mike printed after the break 200 pamphlets per hour * 2 hours = 400 pamphlets. Leo worked third of the time that Mike worked before the break, so he worked 9 hours / 3 = 3 hours. Leo worked twice as fast as Mike before his break 600 pamphlets per hour * 2 = 1200 pamphlets per hour. Leo printed 1200 pamphlets per hour * 3 hours = 3600 pamphlets. Combining the pamphlets of Leo and Mike 5400 + 400 + 3600 = 9400 pamphlets. The answer is 9400.