Q: Toby has two rectangles of cloth. The first is 4 inches wide and 5 inches tall. The second is 3 inches wide and 6 inches tall. How many more square inches is the area of the first compared to the second?
A: The first has an area of 20 square inches because (4 x 5) = 20. The second has an area of 18 square inches because (3 x 6) = 18. The difference in area is 20 - 18 = 2 square inches. The answer is 2.
Question: Susie opens a pizza store. She charges $3 per slice and $15 for a whole pizza. If she was able to sell 24 slices of pizza and 3 whole pizzas, how much money did she earn?
Answer: She was able to earn 24 x 3 = $72 after selling 24 slices. She earned 15 x 3 = $45 after selling 3 whole pizzas. Therefore, she earned a total of $72 + $45 = $117. The answer is 117.
[Question]Tony has two fish. Every year, his parents buy him two more, but one of them dies. How many fish will he have in five years?
[Answer]Each year Tony has one more fish than before because 2 - 1 = 1. In five years, he will have 5 more fish because 5 x 1 = 5. In five years he will have 7 fish because 2 + 5 = 7. The answer is 7.
Q: Nigel won $45 but gave some away. His mother gave him $80 more. If now Nigel has $10 more than twice the amount he originally had, how much money did he give away?
A: Twice the amount Nigel originally had is 2 * 45 = 90 dollars. Now, Nigel has 10 dollars more, meaning that he has 10 + 90 = 100 dollars. Before his mother gave him 80 dollars, he had been left with 100 - 80 = 20 dollars. This means that Nigel gave away 45 - 20 = 25 dollars. The answer is 25.
Question: Three snails raced across a rain-soaked sidewalk. The first snail raced at a speed of 2 feet per minute. The second snail raced at twice the speed of the first snail. And the third snail traveled at five times the rate of speed as the second snail. If it took the first snail 20 minutes to race all the way up the sidewalk, how long, in minutes, did it take for the third snail to race all the way up the sidewalk?
Answer: If the first snail traveled the distance in 20 minutes, then the second snail, traveling at twice the rate of speed, would take 20 / 2 = 10 minutes to complete the race. If the third snail raced at five times the speed of the second snail, then it would take the third snail 10 / 5 = 2 minutes to race all the way up the sidewalk. The answer is 2.
Q: Brennan was researching his school project and had to download files from the internet to his computer to use for reference. After downloading 800 files, he deleted 70% of them because they were not helpful. He downloaded 400 more files but again realized that 3/5 of them were irrelevant. How many valuable files was he left with after deleting the unrelated files he downloaded in the second round?
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The number of non - valuable files Brennan downloaded in the first round is 70 / 100 * 800 = 560 files. The number of valuable files Brennan downloaded in the first round is 800 - 560 = 240. When he downloaded 400 new files, there were 3 / 5 * 400 = 240 non - useful files, which he deleted again. The total number of valuable files he downloaded in the second round is 400 - 240 = 160. To write his research, Brennan had 160 + 240 = 400 useful files to reference to write his research. The answer is 400.