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1. Sound travels approximately 2,200 feet every 2 seconds at sea level. Approximately how many feet will sound travel at sea level in 37 seconds?
2. 314
3. 40,700
4. 81,400
5. 162,800
6. Asher walks 25 meters in 12.6 seconds. If he walks at the same pace continually, which of these is approximately his distance covered in 2 minutes?
7. 200 meters
8. 200 meters
9. 250 meters
10. 500 meters
11. It takes 1,000 milliliters of a chemical substance to create the glass for a 700-square-meter window. If a window were 1,400 square meters, about how many windows could 18,000 milliliters of the chemical substance create?
12. 9 windows
13. 20 windows
14. 25 windows
15. 50 windows
16. If yyards and 55 inches is equal to 595 inches, what is the value of y?
17. A weekly magazine, published 52 weeks a year, sells half-page ads, (2 per page), on one quarter of the 60 pages in each edition. How many half-page ads are published in 12 weeks during June, July, and August?
18. Light travels about 186,000 miles per second. It takes about 4.2 years for light to travel from the star Alpha Centauri to Earth. Which of the following is the best estimate of the distance light will travel during 10% of the time it takes to get from Alpha Centauri to Earth?
19. 7.12103 × 10⁵miles
20. 1.3245120 × 10⁷miles
21. 2.46359232 × 10⁸miles
22. 2.46359232 × 10¹²miles
23. A small drone uses half a tank of fuel to fly 30 kilometers. Which of the following is the maximum distance that the drone could fly on  tanks of fuel?
24. 75 kilometers
25. 100 kilometers
26. 125 kilometers
27. 150 kilometers
28. It takes a long-haul truck driver 3 hours to travel between 2 towns 60 miles apart. What is the best estimate in hours of the time it would take the driver to travel between 2 towns 150 miles apart?
29. The floor of the concession area of the transportation center has 6,700 square feet of glass floor and 1,048 square feet of brick floor. If half the floor of the concession area is occupied by stores and there are 13 stores, what is the average floor area of each store?
30. 150
31. 298
32. 325
33. 400
34. 1,000 milliliters = 1 liter

1,000 liters = 1 kiloliter

The Cryolab stores frozen material in 1-kiloliter containers. The technician adds 400 liters to an empty container. How many milliliters remain empty in the container?

1. 40
2. 60
3. 400,000
4. 600,000
5. During the Civil War, blockade runners sailed the 28 miles from Fort Fisher to Wilmington, North Carolina, up the Cape Fear River. Today, a modern outboard motor boat can travel that distance in 30 minutes. On average, what would be the speed in miles per hour of an outboard motor boat as it travels this distance?
6. Newspapers are printed on a special kind of paper called newsprint. Newsprint is sold by the ton, and prices go down as the quantity of paper goes up. In one recent year, 20 tons of paper cost \$7,600, while 5 tons of paper cost \$2,150. Which of the following is closest to the change in cost per ton?
7. \$25
8. \$50
9. \$430
10. \$5,450
11.  

The research team is reviewing the final portion of a recent spacecraft flight. They have relevant details about the length of the entire flight, the number of electronic checkpoints during the flight, the length of the spacecraft, the number of feet traveled per second in the final portion, and the length of the final portion. About how many feet would the spacecraft travel during the final portion?

1. 988 ft
2. 3,800 ft
3. 190,000 ft
4. 11,400,000 ft
5. A commuter takes 50 minutes to drive a 40-mile trip into the city during the weekday morning rush hour. It takes  as long for the commuter to drive home in the afternoon. Driving in on a Saturday takes the commuter  times as long as to drive in during the weekday rush. About how much time does he save by traveling in on Saturday than during a weekday?
6. 6 minutes
7. 8 minutes
8. 10 minutes
9. 12 minutes
10. Individual bags of cement at the hardware store weigh 20 pounds and cost \$11. The hardware store receives an order for 740 pounds of cement. How many \$20 bills is enough to pay for this order?
11. M&M Milk Chocolate Candies are reported to be partitioned as follows: 24% cyan blue, 20% orange, 16% green, 14% bright yellow, 13% red, and 13% brown. If the candies are mixed in a large batch of 1,000,000 that follows the percentages above, how many candies will be orange?
12. 10,000
13. 20,000
14. 100,000
15. 200,000
16. A block of ice is 2 feet by 3 feet by 4 feet. The block melts 0.8 cubic feet each hour. How much ice is left after 3 hours?
17. 0 cubic feet
18. 2.4 cubic feet
19. 21.6 cubic feet
20. 24 cubic feet
21. Polly is making a Halloween costume to dress up as a flower. Her pattern requires 2 feet of fabric for each flower petal. What is the maximum number of petals she can make with 3 yards of fabric? (1 yard = 3 feet.)
22. 2
23. 4
24. 6
25. 8
26. The mason is using flagstones (10 inches on a side) to construct a walk to the front door of a house. She is also using small flat stones (3 inches) on each side. Before construction begins how many of the small square stones laid end to end would match 12 flagstones laid end to end?
27. 10
28. 20
29. 30
30. 40
31.  
32.  
33.  
34.  
35. 6
36. At the beginning of registration, 40 freshman students enrolled in Statistics 101, while 50 sophomore students enrolled in the course. If 22 more sophomore students enroll before the end of registration, how many more freshman students must enroll so that  of the students are freshmen?
37. 5
38. 8
39. 16
40. 24

Tỉ lệ: là mối quan hệ giữa 2 số.

Thời Gian . Tốc Độ = Thành Quả

T . V = S