Sing Yin Secondary School First Term Examination‚ 2009 – 2010 Mathematics 1 Form 3 Full marks: 100 Answer ALL questions. Unless otherwise specified‚ all working must be clearly shown. The diagrams in this paper are not necessarily drawn to scale. Unless otherwise specified‚ numerical answers should either be exact or correct to 3 significant figures. 1. 2. Time allowed: 1.5 hours Simplify 2 8 + 24 . x 2 − 5x − 6 ‚ x 3 − 27 . ( ) (4 marks) Factorize (a) (b) (4 marks) (4
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Suppose you work at a music store and have four CDs you wish to arrange from left to right on a display shelf. The four CDs are hip-hop‚ country‚ rock‚ and alternative (shorthand: H‚ C‚ R‚ A). How many options do you have? Solution: If you select H first then you still have three options remaining. If you then pick C‚ you have two CDs to choose from. You can find the number of ways to arrange your display by the factorial rule: for the first choice (event) you have 4 choices; for the second‚ 3;
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Vitamin C –A Natural Antioxidant Concept: Vitamin C (ascorbic acid) is an antioxidant. The amount of vitamin C content in food can be found out by titrating with an oxidising agent‚ e.g. iodine. In the reaction‚ vitamin C is oxidised‚ while iodine is reduced to iodide ions. The endpoint is determined by the formation of blue-black starch-iodine complex when all vitamin C is oxidised and excess iodine is free to react with the starch solution added as indicator. Introduction Vitamin C is an important
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NATIONAL SENIOR CERTIFICATE GRADE 11 MATHEMATICS P2 EXEMPLAR 2013 MARKS: 150 TIME: 3 hours This question paper consists of 12 pages and 3 diagram sheets. Copyright reserved Please turn over Mathematics/P2 2 NSC – Grade 11 Exemplar DBE/2013 INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. This question paper consists of 11 questions. 2. Answer ALL the questions. 3. Clearly show ALL calculations
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orange juices‚ and we also used 0.1% of vitamin C solution. The aim of our experiment was to see how much DCPIP was needed to be added to make the orange juices turn back to the orange colour and the DCPIP to decolourise once the 0.1% of vitamin C was added. DCPIP is a blue dye in its non-reduced form; it becomes colourless when it gains electrons. Vitamin C is an anti – oxidant‚ this is found mainly in fresh fruit and vegetables. The main use of Vitamin C is that it neutralises free radicals‚ which
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Mathematics WORKED SOLUTIONS FOR CSEC® EXAMINATIONS 2006 –2010 DEREK MCMONAGLE CSEC® is a registered trade mark(s) of the Caribbean Examinations Council (CXC). MATHEMATICS Worked Solutions for CSEC® Examinations 2006–2010 is an independent publication and has not been authorized‚ sponsored‚ or otherwise approved by CXC. 9780230407381_FM.indd 1 9/15/10 9:22 AM Macmillan Education Between Towns Road‚ Oxford‚ OX4 3PP A division of Macmillan Publishers Limited Companies and representatives
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(2 marks) b. Sketch the contour map of the function f ( x‚ y ) using three level curves‚ c = 1‚ 2‚ 3 . (4 marks) c. Use 3D-contour map to sketch roughly the surface of f ( x‚ y ) . (2 marks) 2 4 x2 − y 2 ‚ x2 + 2 y 2 f ( x‚ y ) along x- axis and y-axis‚ Given the function f ( x‚ y ) = a. find the lim ( x ‚ y )→(0‚0) (4 marks) b. does the lim ( x ‚ y )→(0‚0) f ( x‚ y ) exist? (1 marks) c. is the function f ( x‚ y ) continuous? (2 marks) 3 Given the function f ( x‚ y ) = cos(
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C programs 1. Program to print text 2.Program To Read Two Numbers And Print The Sum Of Given Two Numbers. 3.Program To Accept Student Roll No‚ Marks in 3 Subjects and Calculate Total‚ Average and Print it. 4.Program To Read Three Numbers And Print The Biggest Of Given Three Numbers 5.Program To Read A Number And Find Whether The Given Number Is Even Or Odd. 6.Program to accept a year and check whether the given year IS leap year or not. 7.Individual Digits 8. Program to accept a three digit number
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mathematics extends into other areas of life. While some people may think of mathematics and art as being two separate entities‚ Math is very present in many artistic endeavors. Music‚ commonly referred to as an art‚ would not be possible without the relationship it shares with mathematics. In many different ways‚ math is an important part of music theory. One way that math and music theory are intertwined is within a theory of mathematics called Geometrical Music Theory. Clifton Callender‚ Ian Quinn
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Determine the sampling distribution of the sample mean for samples of size 60. b . Repeat part (a) for samples of size 120. c . Must you assume that the blood glucose levels are normally distributed to answer parts (a) and (b)? Explain your answer. Ans: a . Approximately normally distributed with mean 4.60 and standard deviation 0.021. b . Approximately normally distributed with mean 4.60 and standard deviation 0.015. c . No‚ because‚ in each case‚ the sample size exceeds 30. 2. Diamond Pricing . In a Singapore edition of Business Times
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