Math105_Exam3_W11 - Math 105 Final Exam Name Instructor...

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Math 105 — Final Exam April 25, 2011 Name: Instructor: Section: 1. Do not open this exam until you are told to do so. 2. This exam has 9 pages including this cover. There are 10 problems. Note that the problems are not of equal difficulty, so you may want to skip over and return to a problem on which you are stuck. 3. Do not separate the pages of this exam. If they do become separated, write your name on every page and point this out to your instructor when you hand in the exam. 4. Please read the instructions for each individual problem carefully. One of the skills being tested on this exam is your ability to interpret mathematical questions, so instructors will not answer questions about exam problems during the exam. 5. Show an appropriate amount of work (including appropriate explanation) for each problem, so that graders can see not only your answer but how you obtained it. Include units in your answer where that is appropriate. 6. You may use any calculator except a TI-92 (or other calculator with a full alphanumeric keypad). However, you must show work for any calculation which we have learned how to do in this course. 7. If you use graphs or tables to find an answer, be sure to include an explanation and sketch of the graph, and to write out the entries of the table that you use. 8. Turn off all cell phones and pagers , and remove all headphones. Problem Points Score 1 12 2 18 3 9 4 12 5 13 6 5 7 5 8 9 9 5 10 12 Total 100
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Math 105 / Final (April 25, 2011) page 2 1 . [12 points] Circle “TRUE” or “FALSE” for each of the following problems. Circle “TRUE” only if the statement is always true. a.) If a chemical substance has a half-life of 2 months, then 1/4 of the substance decays in one month. True False b.) The graph of y = ln x has a horizontal asymptote. True False c.) If cos( θ ) = 0 . 2753 and 0 θ π/ 2, then cos( π - θ ) = - 0 . 2753 . True
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Math105_Exam3_W11 - Math 105 Final Exam Name Instructor...

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