[Question]Sarah's external drive showed 2.4 gigabytes free and 12.6 gigabytes used. She decided to delete a folder of size 4.6 gigabytes and store new files of 2 gigabytes. If she will transfer all her files to a new external drive of size 20 gigabytes, how many free gigabytes will the new external drive have?
[Answer]There were 12.6 - 4.6 = 8 gigabytes used after deleting some files. Then, the used space went up to 8 + 2 = 10 gigabytes after storing other files. Thus, the new 20 gigabytes external drive will have 20 - 10 = 10 gigabytes free. The answer is 10.
Q: John takes 3 naps a week. Each nap is 2 hours long. In 70 days how many hours of naps does he take?
A: There are 70 / 7 = 10 weeks in 70 days. So he takes 10 * 3 = 30 naps. That means he naps for 30 * 2 = 60 hours. The answer is 60.
Question: Mary's sheep can run 12 feet per second, and her sheepdog can run 20 feet per second. A sheep standing 160 feet away from the sheep dog bolts, and the dog runs after it. How many seconds does it take the dog to catch the sheep?
Answer: First find how much faster the dog is than the sheep: 20 feet / second - 12 feet / second = 8 feet / second. Then divide the distance the dog needs to run by the speed difference: 160 feet / 8 feet / second = 20 seconds. The answer is 20.
[Question]A fruit basket consists of 4 bananas, 3 apples, 24 strawberries, 2 avocados, and a bunch of grapes. One banana costs $1. An apple costs $2. 12 strawberries cost $4. An avocado costs $3, and half a bunch of grapes costs $2. What is the total cost of the fruit basket?
[Answer]The bananas cost 4 x $1 = $4. The apples cost 3 x $2 = $6. The strawberries cost (24 / 12) x $4 = $8. The avocados cost 2 x $3 = $6. The grapes cost 2 x $2 = $4. The total cost of the fruit basket is $4 + $6 + $8 + $6 + $4 = $28. The answer is 28.
Q: A class is completing an art project. Each of the 30 students is assigned to a separate group and will need to take markers from the 22 boxes of markers. The first group has 10 students who will have 2 markers each and the second group has 15 students who will have 4 markers each. The last group takes the remaining markers and divides them equally. If each box of markers contains 5 markers, how many markers does each of the students in the last group receive?
A: The first group uses a total of 10 students * 2 markers = 20 markers. The second group uses a total of 15 students * 4 markers = 60 markers. This is a total of 20 + 60 = 80 markers. The total number of markers in the boxes is 5 markers * 22 boxes = 110 markers. This leaves 110 – 80 = 30 markers for the last group to split between themselves. The last group is made up of 30 total students – 10 students in the first group – 15 students in the second group = 5 students. Therefore, students in the last group receive 30 markers / 5 students = 6 markers each. The answer is 6.
Question: Diana earned $150 in July. She earned 3 times this amount in August. In September, She earned twice the money she earned in August. How much money did Diana earn over these three months?
Answer:
The amount of money Diana earned in August is 3 * $150 = $450. The amount of money Diana earned in September is 2 * $450 = $900. The total amount of money Diana earned over the three months is $150 + $450 + $900 = $1500. The answer is 1500.