GRADE 11 NOVEMBER 2014 MATHEMATICAL LITERACY P2

Transcription

1 NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2014 MATHEMATICAL LITERACY P2 MARKS: 100 TIME: 2 hours *imlit2* This question paper consists of 9 pages including a 1 page annexure.

2 2 MATHEMATICAL LITERACY P2 (NOVEMBER 2014) INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. This question paper consists of FOUR questions. Answer ALL the questions. QUESTION 3.1 must be answered with reference to ANNEXURE A. 2. Number the questions correctly according to the numbering system used in this question paper. 3. An approved calculator (non-programmable and non-graphical) may be used, unless stated otherwise. 4. ALL calculations and steps must be shown clearly. 5. ALL the final answers must be rounded off to TWO decimal places, unless stated otherwise. 6. Start EACH question on a NEW page. 7. Write neatly and legibly.

3 (NOVEMBER 2014) MATHEMATICAL LITERACY P2 3 QUESTION 1 Zeederberg High School has two Grade 12 classes, namely Grade 12A and Grade 12B. These two classes are in competition with each other. This competition is about raising funds for the school. 1.1 Both of these classes will be selling cold drinks during break time. They buy the cold drinks in 2-litre bottles. Grade 12A uses 125 millilitre cups and sells it at R2,00 each. Grade 12B uses 250 millilitre cups and sells it at R3,50 each How many cups can Grade 12A sell from ONE 2-litre bottle? (3) How many cups can Grade 12B sell from ONE 2-litre bottle? (3) They bought the 2-liter cold drinks for R8,99 each. From selling ONE 2-litre, Grade 12B claims their profit will be greater than that of Grade 12A, because their cups are bigger and they charge more per cup. Show with the necessary calculations whether you agree or disagree with Grade 12B. (8) Calculate the percentage profit that Grade 12A made on selling ONE 2 litre-bottle. Use the formula: Percentage profit = x 100 Give your final answer to the nearest 10 percent. (3)

4 4 MATHEMATICAL LITERACY P2 (NOVEMBER 2014) 1.2 The following stack bar graph shows the sales of the cold drinks of the two classes for two weeks. Use the graph to answer the questions below On which day or days did both classes sell the same amount of cups of cold drinks? (2) Calculate the difference between the most number of cups of cold drinks and the least number of cups cold drinks sold per day for Grade 12B. (3) There was only ONE day that Grade 12B sold more cups of cold drinks than Grade 12A. Which day was it? (2) What is the modal value of the number of cups of cold drinks for the two-week period for both classes? (2) Grade 12A claims that on average they sell more cold drinks than Grade 12B. Do you agree, or disagree with this statement? Show all necessary calculations to justify your answer. (8) Write the number of cups of cold drinks for Day 1 of Grade 12A and the number of cups of cold drinks for Grade 12B as a ratio in its simplest form. (2) [36]

5 (NOVEMBER 2014) MATHEMATICAL LITERACY P2 5 QUESTION Vuyo bought tuna in bulk from a factory shop at a very good price. He wants to send some of it to his sister. Look at the following drawings (not drawn to scale) and answer the questions that follow. r h TUNA h w l Dimensions of the box Length (l) = 48 cm Width (w) = 35 cm Height (h) = 15 cm Dimensions of the tuna tin Radius (r) = 4,2 cm Height (h) = 3,8 cm How many tuna tins can Vuyo pack across the length of the box? (4) How many tuna tins can Vuyo pack across the width of the box? (3) How many tuna tins can Vuyo stack on top of each other? (3) Vuyo claims that he can get more than 50 tuna tins packed in the box. Show with the necessary calculations whether his statement is true. (3) 2.2 Vuyo has two options to get this box to his sister. He can either deliver it himself or he can make use of the Post Office Services. The distance between Vuyo and his sister is 100 km. Vuyo s car uses 7,6 litres of petrol for every 100 km. At the time that Vuyo wanted to go to his sister, the petrol cost was R13,20 per litre. The Post Office charges R35,10 for the first kilogram and for each additional kilogram or a part of a kilogram R4,70. The mass of the tuna tin is 170 gram. Use the above information and determine by means of calculations which of these two options will be the most economical one for Vuyo. (8) [21]

6 6 MATHEMATICAL LITERACY P2 (NOVEMBER 2014) QUESTION Study the map of the Johannesburg City Centre, ANNEXURE A, and answer the questions below The traffic in Catherine Road (Grid B2) can only flow in one direction. What is this direction of flow? (2) What do we call streets that only flow in one direction? (2) Name any street where the traffic can only flow in an easterly direction. (2) Give the grid reference of the Johannesburg College of Education. (2) Marcia wanted to visit the Johannesburg Art Gallery (Grid C3). The person who directed her gave her the wrong directions and she found herself at the City Hall (Grid B3). Give Marcia detailed directions how to walk from the City Hall to the Johannesburg Art Gallery. (3) Write the scale of the map as 1 : Show all calculations. (3) Marcia and her friend, Zoe, came from different directions to the Johannesburg Station (Grid B3). Marcia travels from the City Hall and Zoe from the Civic Centre (Grid B2). With the necessary calculations, who will be walking the shortest distance in metres? (6) HINT: Use the centre of the dots as your starting points and follow the roads. 3.2 While Marcia and Zoe are waiting on the train, they played a game with a pack of 52 playing cards. They are playing a game, called 7 cards where each one is dealt seven cards at the beginning of the game. They then have to build seven cards of the same suite. A pack of playing cards has 4 suites namely diamonds, hearts, clubs and spades How many of each suite are there before dealing the cards? (2) What is the probability that the first card dealt to Zoe will be black and 10? (3) [25]

7 (NOVEMBER 2014) MATHEMATICAL LITERACY P2 7 QUESTION For the type of work that Blythe is doing, he must have a reliable laptop or computer system. His laptop crashed and he is desperately in need of a new one. He saw the following advertisement in the newspaper. Study the advertisement carefully and answer the questions below Calculate the price of the package before the discount. (2) The discount in the advert is R900. Calculate this discount as a percentage to 1 decimal place. (3) The fine print in the bottom right hand corner indicates Interest rate from 8,5%. Total repayment from R6 202,39. Briefly explain the meaning of this fine print. (2) If the discounted price is used with the interest rate of 8,5% per annum as indicated in the fine print, calculate the final amount. Also state whether the final value is the same as in the fine print and if not, give an explanation. Use the simple interest formula: A = P(1 + ni), where A = Final amount P = Original amount i = interest rate n = term in years (5) Explain ONE disadvantage of buying an item on credit. (2)

8 8 MATHEMATICAL LITERACY P2 (NOVEMBER 2014) 4.2 The following pie chart shows what Blythe uses his laptop for. Answer the questions that follow Give a suitable heading for the pie chart. (2) Name any TWO usages of the laptop that fall under the category of other. (2) [18] TOTAL: 100

9 (NOVEMBER 2014) MATHEMATICAL LITERACY P2 9 QUESTION 3.1 ANNEXURE A

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17 NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2014 MATHEMATICAL LITERACY P2 MEMORANDUM MARKS: 100 Symbol M MA CA A C S RT/RG/RM F SF J / O P R Explanation Method Method with accuracy Consistent accuracy Accuracy/Answer Conversion Simplification Reading from a table/reading from a graph/read from map Choosing the correct formula Substitution in a formula Justification Penalty, e.g. for no units, incorrect rounding off etc. Rounding Off/Reason This memorandum consists of 7 pages.

18 2 MATHEMATICAL LITERACY P2 (NOVEMBER 2014) QUESTION 1 QUESTION SOLUTION litres = ml No of cups = ml 125 ml = 16 cups OR 125 ml = 0,125 l 1C Conversion to ml OR l 1M divided by 125 OR 0,125 1CA No of cups = 2 l 0,125 l = 16 cups (3) litres = ml No of cups = ml 250 ml = 8 cups OR 250 ml = 0,250 l 1C Conversion to ml OR l 1M divided by 250 OR 0,250 1CA No of cups = 2 l 0,250 l = 8 cups (3) Grade 12A Profit = Income Expenses = (16 x 2,00) 8,99 = 32 8,99 = R23,01 Grade 12B Profit = Income Expenses = (8 x 3,50) 8,99 = 28 8,99 = R19,01 Disagree, Grade 12A makes R4,00 more profit (R23,01 R19,01). 1CA multiplying 16 x 2 according to answer in CA difference between income and expenses 1CA 1CA multiplying 8 x 3,50 According to answer in CA difference between income and expenses 1CA 2CA Opinion (8) Percentage profit = 23,01 x 100 8,99 1 = 255,95% 260% 1M concept of % 1A 1CA rounding to nearest 10 (depending on answer) (3)

19 (NOVEMBER 2014) MATHEMATICAL LITERACY P Day 3 2RG (2) Difference = = 68 cups of cold drink 2RG correct values 1A (3) Day 4 2RG (2) cups of cold drinks 2RG (2) Grade 12A Average = = = 66 cups Grade 12B Average = = = 54 cups Agree with statement. Grade 12A s average is greater than Grade 12B s average. 1M adding correct values 1M divided by 10 1CA 1M adding correct values 1M divided by 10 1CA 2J (8) : 20 8 : 5 1M writing as ratio 1A simplest form (2) [36]

20 4 MATHEMATICAL LITERACY P2 (NOVEMBER 2014) QUESTION Number of tins across length = 48 cm 8,4 cm = 5,714 5 tins Number of tins across width = 35 cm 8,4 cm = 4,166 4 tins Number of tins stacked on top of each other = 15 cm 3,8 cm = 3,947 3 tins Number of tins that can go into the box = 5 x 4 x 3 = 60 tins Vuyo is correct, he will be able to pack more than 50 tins into the box. 2.2 Cost of the trip = 7,6 x R13,20 = R100,32 1M using the correct length 1A find diameter 1A 1R rounding down (4) 1M using the correct width 1A 1R rounding down (3) 1M using the correct values 1A 1R rounding down (3) 1M 1CA using values as in CA justification (3) 1M 1A Post Office Services 1 tin tuna = 170 g 60 tins tuna = 60 x 170 g = g = 10,2 kg Rate = 35,10 + (4,70 x 10 kg) = 35, ,00 = R82,10 He must make use of the Post Office Services because he will pay R18,22 (R100,32 R82,10) less. 1CA finding the mass of 60 tins (depending on answer in 2.1.4) 1A convert g to kg 1CA substitution in formula 1CA 2CA choose most economical option (8) [21]

21 (NOVEMBER 2014) MATHEMATICAL LITERACY P2 5 QUESTION South 2A (2) One-way streets 2A (2) Girton/Park/Jorrisen/Juta/Breë/Smit/ Prospect/Olivia/Park (Any 1) 2A (2) B1 OR 1B 2A (2) Up Harrison Street right into Breë Street left into King George (Accept any logical directions.) 3A (3) Scale 2,5 cm = 500 m 2,5 cm = 500 x 100 2,5 cm = cm 1 cm = cm 1 : OR 2,5 cm = 500 m 1 cm = 200 m 1 cm = 200 x 100 cm 1 cm = cm 1 : A measuring scale on map 1A converting 500 m to cm 1A scale (3)

22 6 MATHEMATICAL LITERACY P2 (NOVEMBER 2014) Marcia Scale = 1 : Distance = 4,2 cm (ACCEPT 4,1 4,3) Distance in meters = 4,2 x = 840 m OR Distance in meters = 4,2 x 200 (ACCEPT 4,1 4,3) = 840 m Zoe Scale = 1 : Distance = 3,3 cm Distance in meters = 3,3 x (ACCEPT 3,2 3,4) 100 = 660 m OR Distance in meters = 3,3 x 200 (ACCEPT 3,2 3,4) = 660 m Zoe s distance is 180 m (840 m 660 m) shorter than that of Marcia. 1A Measuring distance 1CA convert to meters 1A Measuring distance 1CA convert to meters 1CA Identify shortest distance 1CA difference in distance (CA mark applies for scale calculated in 3.1.6) (6) Number of cards in each suite = 52 4 = Probability (black and 10) = = 4 26 = 2 13 OR 0,154 OR 15,4% 1M 1A (2) 1A identifying both 1M adding 1A (3) [25]

23 (NOVEMBER 2014) MATHEMATICAL LITERACY P2 7 QUESTION Price before discount = R3 999,90 + R900 = R4 899, % discount = 900 x ,90 1 = 18, = 18,4 % 1M adding correct values 1A (2) 1M concept of % 1A 1R rounding to 1dec. place (3) The interest rate is not equal to 8,5 %, but starts at 8,5%. The repayment value is not equal to R6 202,39, but starts at R6 202,39. (Accept any other relevant explanation.) A = P(1 + ni) = 3 999,90 (1 + 0,085 x 2) = 3 990,90 (1,17) = R4 679,88 1A: explanation from 8,5% 1A: explanation from R6 202,39 1 SF substitute correct values 1 S simplify bracket 1CA (2) Final answer is not the same. The interest rate for this purchase is not 8,5%. 2A opinion (5) You pay much more due to interest calculated. OR Item only belongs to you when final payment is made. (Accept any relevant answer.) 2A (2) Accept any suitable heading. 2A (2) Music, videos and photos (Accept any other usage not mentioned in the pie chart.) 2A 1 mark per usage (2) [18] TOTAL: 100