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0580 w11 qp_21
1.
w w ap eP m e tr .X w om .c s er UNIVERSITY OF CAMBRIDGE
INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *7755338632* 0580/21 MATHEMATICS October/November 2011 Paper 2 (Extended) 1 hour 30 minutes Candidates answer on the Question Paper. Additional Materials: Electronic calculator Mathematical tables (optional) Geometrical instruments Tracing paper (optional) READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. If working is needed for any question it must be shown below that question. Electronic calculators should be used. If the degree of accuracy is not specified in the question, and if the answer is not exact, give the answer to three significant figures. Give answers in degrees to one decimal place. For π, use either your calculator value or 3.142. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. The total of the marks for this paper is 70. This document consists of 12 printed pages. IB11 11_0580_21/4RP © UCLES 2011 [Turn over
2.
2 1 Use your calculator
to find 45 × 5.75 3.1 + 1.5 For Examiner's Use . Answer 2 [2] Work out 2(3 × 108 – 4 × 106), giving your answer in standard form. Answer 3 Write the following in order of size, largest first. sin 158° cos 158° cos 38° 3 Write down all the working to show that sin 38° K Answer 4 [2] 5 3 5 + × K K [2] 2 1 =3 . 6 2 3 3 Answer [3] © UCLES 2011 0580/21/O/N/11
3.
3 5 A circle has
a radius of 50 cm. For Examiner's Use (a) Calculate the area of the circle in cm2. Answer(a) cm2 [2] Answer(b) m2 [1] (b) Write your answer to part (a) in m2. 6 NOT TO SCALE The front of a house is in the shape of a hexagon with two right angles. The other four angles are all the same size. Calculate the size of one of these angles. Answer © UCLES 2011 0580/21/O/N/11 [3] [Turn over
4.
4 7 For Examiner's Use NOT TO SCALE O y° B 50° z° A t° T TA is
a tangent at A to the circle, centre O. Angle OAB = 50°. Find the value of (a) y, Answer(a) y = [1] Answer(b) z = [1] Answer(c) t = [1] (b) z, (c) t. 8 Seismic shock waves travel at speed v through rock of density d. v varies inversely as the square root of d. v = 3 when d = 2.25. Find v when d = 2.56. Answer v = © UCLES 2011 0580/21/O/N/11 [3]
5.
5 9 For Examiner's Use A O The point A
lies on the circle centre O, radius 5 cm. (a) Using a straight edge and compasses only, construct the perpendicular bisector of the line OA. [2] (b) The perpendicular bisector meets the circle at the points C and D. Measure and write down the size of the angle AOD. Answer(b) Angle AOD = © UCLES 2011 0580/21/O/N/11 [1] [Turn over
6.
6 10 In a
flu epidemic 45% of people have a sore throat. If a person has a sore throat the probability of not having flu is 0.4. If a person does not have a sore throat the probability of having flu is 0.2. For Examiner's Use Flu 0.45 Sore throat 0.4 No flu 0.2 Flu No sore throat No flu Calculate the probability that a person chosen at random has flu. Answer [4] 11 Work out. 2 1 4 3 2 (a) Answer(a) © UCLES 2011 [2] Answer(b) 2 1 (b) 4 3 [2] −1 0580/21/O/N/11
7.
7 12 For Examiner's Use 50 English test mark 40 30 20 10 0 10 20 30 40 50 60 70 80 Mathematics
test mark The scatter diagram shows the marks obtained in a Mathematics test and the marks obtained in an English test by 15 students. (a) Describe the correlation. Answer(a) [1] (b) The mean for the Mathematics test is 47.3 . The mean for the English test is 30.3 . Plot the mean point (47.3, 30.3) on the scatter diagram above. (c) (i) Draw the line of best fit on the diagram above. [1] [1] (ii) One student missed the English test. She received 45 marks in the Mathematics test. Use your line to estimate the mark she might have gained in the English test. Answer(c)(ii) © UCLES 2011 0580/21/O/N/11 [1] [Turn over
8.
8 13 C A B For Examiner's Use D a b O A and B
have position vectors a and b relative to the origin O. C is the midpoint of AB and B is the midpoint of AD. Find, in terms of a and b, in their simplest form (a) the position vector of C, Answer(a) Answer(b) (b) the vector [2] [2] . T = 2π 14 l g (a) Find T when g = 9.8 and ℓ = 2. Answer(a) T = [2] Answer(b) g = [3] (b) Make g the subject of the formula. © UCLES 2011 0580/21/O/N/11
9.
9 15 A container
ship travelled at 14 km/h for 8 hours and then slowed down to 9 km/h over a period of 30 minutes. For Examiner's Use It travelled at this speed for another 4 hours and then slowed to a stop over 30 minutes. The speed-time graph shows this voyage. 16 14 12 10 Speed (km / h) 8 6 4 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Time (hours) (a) Calculate the total distance travelled by the ship. Answer(a) km [4] (b) Calculate the average speed of the ship for the whole voyage. Answer(b) © UCLES 2011 0580/21/O/N/11 km/h [1] [Turn over
10.
10 16 For Examiner's Use y C (9,7) NOT TO SCALE A
(1,3) O x B (3,0) The co-ordinates of A, B and C are shown on the diagram, which is not to scale. (a) Find the length of the line AB. Answer(a) AB = [3] Answer(b) [3] (b) Find the equation of the line AC. © UCLES 2011 0580/21/O/N/11
11.
11 f(x) = 17 1 (x ≠
O4) x+4 For Examiner's Use g(x) = x2 – 3x h(x) = x3 + 1 (a) Work out fg(1). Answer(a) [2] Answer(b) h 1(x) = [2] O (b) Find h 1(x). O (c) Solve the equation g(x) = O2. Answer(c) x = or x = [3] Question 18 is printed on the next page. © UCLES 2011 0580/21/O/N/11 [Turn over
12.
12 18 The first
four terms of a sequence are T1 = 12 T2 = 12 + 22 T3 = 12 + 22 + 32 (a) The nth term is given by Tn = 1 6 For Examiner's Use T4 = 12 + 22 + 32 + 42 . n(n + 1)(2n + 1). Work out the value of T23. Answer(a) T23 = [2] (b) A new sequence is formed as follows. U1 = T2 – T1 U2 = T3 – T2 U3 = T4 – T3 ……. (i) Find the values of U1 and U2. Answer(b)(i) U1 = and U2 = [2] (ii) Write down a formula for the nth term, Un . Answer(b)(ii) Un = [1] (c) The first four terms of another sequence are V1 = 22 V2 = 22 + 42 V3 = 22 + 42 + 62 V4 = 22 + 42 + 62 + 82. By comparing this sequence with the one in part (a), find a formula for the nth term, Vn . Answer(c) Vn = [2] Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2011 0580/21/O/N/11
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