Math 254B



Math 254B Name_____________________________

Essential Mathematics Date _____________________________

Practice Problems for Exam 2

Chapters 7 and 9

Exams are closed book and closed notes, except for the Measurements handout given by instructor. You can use an arithmetic calculator. Please show any work necessary to get partial credit. Be sure to show your answers clearly. Good luck on the test!

There will be approximately 25 problems on the exam.

Do these problems on separate paper.

1. Convert as indicated. Use only whole numbers.

a) 16,250 feet = _______miles ________feet

b) 3156 pounds = _______ tons _______ pounds

In problems #2 through #6, round your answers to the nearest tenth if necessary.

2. Convert 114 inches to feet.

3. Convert 7.25 tons to pounds.

4. Convert 120 fluid ounces to quarts.

5. Convert [pic] yards to inches.

6. Convert 2 quarts to cups.

7. a) Convert 7435 centigrams to grams.

b) Convert 0.68 kiloliters to milliliters.

c) Convert 1.7 meters to centimeters.

For problems #8 thru #12, perform the indicated operation. Simplify the result if possible.

8. 15 ft 2 in ( 9 ft 8 in

9. 2 lb 5 oz ( 4

10. 4 kg ( 2410 g

11. 205 mL + 5.61 L

12. 3 tons 817 lbs + 1 ton 726 lbs

13. To feed its pandas a zoo grows a small patch of bamboo. Two weeks ago the bamboo was 5ft 8in. Since then it has grown 2ft 5in. How tall is the bamboo now? Write your answer in simplest form using the given units.

14. A can of soda weighs 336 grams. Find the weight, in kilograms, of 24 cans.

15. According to the Guinness Book of Records, the heaviest baby born in good health weighed 22 pounds 8 ounces. How much heavier is this than a 7 pound 10 ounce baby? Write your answer in simplest form using the given units.

16. A large bottle of juice contains 1.42 L. A smaller bottle contains 946 mL. How much more juice is in the larger bottle? (Answer can be written using either L or mL.)

17. a) Vitamin C tablets come in 500 milligram caplets. Convert this to ounces.

b) How many caplets would you need to have a pound of Vitamin C?

18. a) Convert 102° F to degrees Celsius. If necessary, round to the nearest tenth of a degree.

b) Convert 48º C to degrees Fahrenheit. If necessary, round to the nearest tenth of a degree.

19. A 5th grade class is participating in General Mills Box Tops for Education program where participating schools can redeem box tops of certain products for money. According to this pictograph, about how many total box tops were collected during week 1 and week 2?

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20. The bar graph shows rainfall in Chicago during a typical year (January through December).

a) According to this graph, about how many centimeters of rainfall did Chicago have from March through May?

b) According to this graph, about how many more centimeters of rainfall did Chicago have in August than in July?

21. The FIFA World Cup is held every 4 years. The following line graph shows the average number of goals per game.

Did the average number of goals per game increase or decrease between 1994 and 1998?

22. The chart shows the total enrollment at Cabrillo College for the last several academic years (fall + spring).

Was the increase in enrollment greater between ’00-’01 and ’01-’02 or between ’03- ’04 and ’04-‘05?

The following circle graph shows the percent of the types of books available at a local library. Use it to answer #23.

23. (a) What percent of the books are classified as reference?

(b) If the public library has 125,300 books, how many of them are adult fiction books?

Use the numbers below to answer questions #24 -26. If an answer is not a whole number, round it to one decimal place, that is, to the nearest tenth.

98, 97, 95, 89, 92, 83, 87, 95

24. Find the average (mean):

25. Find the median:

26. Find the mode:

27. Find the median for the following list of numbers: 45, 54, 68, 50, 39

28. Solve using a proportion or an equation: 25 is what percent of 96?

Round your answer to the nearest tenth.

29. It is thought that 35% of students at a college own a car. If there are 12,000 students at the college, how many of them own a car?

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The bar graph below shows the normal monthly precipitation in centimeters for Chicago.

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[pic]

[pic]

Chicago Rainfall

(Source: U.S. National Oceanic and Atmospheric Administration, Climatography of the United States, No. 81.)

Number of Weeks

Each [pic] represents 20 box tops.

J F M A M J J A S O N D

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