04faex1 - MATH 141 Fall 04 Exam 1 — Each problem is worth...

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Unformatted text preview: MATH 141 Fall 04 Exam 1 — October 12, 2004 Each problem is worth 10 points. Some helpful relations: 1 inch = 2.54 cm, 1 foot = 12 inches 1 mile 2 1.6 kilometers 1 kilogram = 2.2 pounds 1 Euro 2 $1.20 1. In France, 2.8 kilograms of cherries cost 6.2 Euros. What is the cost in US dollars per pound? 2. NASA estimates the cost of a trip to the moon and back for one person is $15,000 per kilometer. If the distance to the moon is approximately 240,000 miles, what will be the total cost of sending a person to the moon and bringing them back to earth? Express your answer in scientific notation, Some helpful relations: 1 inch = 2.54 cm, 1 foot = 12 inches 1 mile = 1.6 kilometers 1 kilogram = 2.2 pounds 1 Euro = $1.20 . Airplanes are required to provide 22 cubic centimeters per hour of fresh air for each passenger. What is the amount of fresh air needed for each passenger in cubic inches per minute? . One of your classes is graded solely on a midterm and a final. The midterm is worth 100 points and the final is worth 200 points. You get a 78% on the midterm and an 87% on the final. What percentage of the total points do you receive in the class? MATH 141 Fall 04 Exam 1 - October 12, 2004 Each problem is worth 10 points. Some helpful relations: 1 inch = 2.54 cm, 1 foot = 12 inches 1 mile = 1.6 kilometers 1 kilogram = 2.2 pounds 1 Euro 2 $1.20 1. In France, 28 kilograms of cherries cost 6.2 Euros. What is the cost in US dollars per pound? 2. NASA estimates the cost of a trip to the moon and back for one person is $15,000 per kilometer. If the distance to the moon is approximately 240,000 miles, what will be the total cost of sending a person to the moon and bringing them back to earth? Express your answer in scientific notation, Some helpful relations: 1 inch = 2.54 cm, 1 foot = 12 inches 1 mile : 1.6 kilometers 1 kilogram = 2.2 pounds 1 Euro = $1.20 . Airplanes are required to provide 22 cubic centimeters per hour of fresh air for each passenger. What is the amount of fresh air needed for each passenger in cubic inches per minute? . One of your classes is graded solely on a midterm and a final. The midterm is worth 100 points and the final is worth 200 points. You get a 78% on the midterm and an 87% on the final. What percentage of the total points do you receive in the class? 5. National Geographic Magazine reported that Lake Mendota is frozen on the average 40 fewer days per year than it was 100 years ago. If 100 years ago, Mendota was frozen an average of 130 days per year, what is the percent decrease? 6. Negate each of the following statements: (a) No one here has been to Antarctica. (b) Some students take physiology and botany. (c) You have pneumonia, or you have the flu. 7. It is estimated that 22 pounds of carbon dioxide are emitted into the atmosphere for each gallon of gas used. If 620 trillion gallons of gas are used each year, how much carbon dioxide is emitted? Write your answer in scientific notation. 8. Sally’s dog weighs 15% less than Doug’s dog. Sally’s dog weighs 68 pounds. (a) Fill in the blank in the following sentence: Sally’s dog’s weight is % of Doug’s dog’s weight. (b) How much does Doug’s dog weigh? (c) Fill in the blank in the following sentence: Doug’s dog weighs % more than Sally’s dog. 9. Suppose that John Kerry makes the following statement: “If elected president, I will not reinstate the draft.” Describe all situations in which this statement would be false. 10. A pollster asked 1000 people the following two questions: ”Do you own a dog?” and ”Do you have a child?” The following Venn Diagram depicts her data. In the diagram, the circle labelled “Dog” represents the set of all dog owners, and the circle labelled “Child” represents the set of all people who have a child. Dog 50 300 (a) How many people own a dog and do not have a child? (b) What percentage of people polled have a child? (0) How many people own a dog or have a child? ...
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