Math141Mid4S11

Math141Mid4S11 - Math 141 Name: _ MIDTERM 4 PART 1...

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Math 141 Name: ________________________ MIDTERM 4 – PART 1 (CHAPTERS 5 AND 6) MATH 141 – SPRING 2011 – KUNIYUKI 150 POINTS TOTAL: 57 FOR PART 1, AND 93 FOR PART 2 Show all work, simplify as appropriate, and use “good form and procedure” (as in class). Box in your final answers! No notes or books allowed. • Write units in your final answers where appropriate. • Try to avoid rounding intermediate results; if you do round off, do it to at least five significant digits. • We assume that all vectors on this test are in the usual xy -plane. PART 1: SCIENTIFIC CALCULATORS ALLOWED! (57 POINTS TOTAL) 1) Find the length of Side c for the triangle below using the Law of Sines. Round off your answer to the nearest tenth (i.e., to one decimal place) of an inch. (9 points)
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2) A slanted lightning rod, represented by line segment BC in the figure below, has length 17.1 feet. An observer stands at point A . The observer’s shoes are 12.7 feet from the base of the rod and are 23.4 feet from the top of the rod. Find the measure of Angle A , the angle of elevation from the observer’s shoes to the top of the rod, using the Law of Cosines. Round off your answer to the nearest tenth of a degree. Note: Angle C is obtuse, not right. (10 points)
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This note was uploaded on 09/08/2011 for the course MATH 141 taught by Professor Staff during the Fall '11 term at Mesa CC.

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Math141Mid4S11 - Math 141 Name: _ MIDTERM 4 PART 1...

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