(a) (b) () 6. . graph A 442cm (T br); (b) vit) = 0.463b sm(% alt) = 0.0485 blcos(%bt) () Maximum velocity is 255 cm s~ acceleration is 14700 cms ! 13" 2 27. The data for this experiment are given in the table. An object moves along a line such that its displacement s metres from the origin O is given by s(t) = > 41> + t (a) Find expressions for the objects velocity and acceleration in terms of t. (b) For the interval 1 < < 3, find the time at which the distance from zero is a maximum and find its value. (a) Chapter7 ( -22 Roots are w* = cis 2177 16 ) 60 7, = $88 142 total profit (b) Associative (d) Associative 10. If the inflation rate is 1.7%, calculate the real rate of return per year. A cone is formed from a sector as shown so that the straight edges of the sector touch exactly without any overlap (not to scale): All measurements are in cm. (b) Verify the result by showing that (fo f~! IB Diploma Standard Level is a comprehensive textbook covering the 2019 curriculum. That is out by a whopping 99 000%. (c) Calculate the number of seconds the bucket is underwater during one rotation. 0.4150 6. What other examples are there of pure research that end up having immense practical benefit? WebNew math course starting in September 2019 for IB Class of 2021 Course description from IB Approximate current equivalent Recommended prior math background Mathematics: Applications and interpretation This course is designed for students who enjoy describing the real world and solving practical problems using mathematics, those who are Paper 1. Find the measure of angle AOB in degrees to 3 significant figures. 12-518 15 -o3sarsanion 10718675296 0-53B1s50161 (wHB)/C 12. (a) State the null and alternative hypothesis, indicating which of the two reflects the claim. Suppose the interest rate is 6% per year and the inflation rate is 2% per year. The constructivist is a victim of the success of mathematics in fields such as the natural sciences. 20.93156857 E2:(2'm _ Solution oK The number of grains of rice follows an exponential pattern. (a) $3809.01 0. Specifically, the value of d gives us the position of the principal axis of the function. The price of the car, in US Dollars (USD), can be modelled by the equation P = 8500(0.95)* Jashantis savings, in USD, can be modelled by the equation S = 400 + 2000 In both equations is the time in months since Jashanti started saving for the car. Distance from | Depth shore (km) | (m) 02 20 0.4 1.9 0.6 23 038 23 10 22 12 28 14 33 16 4.0 18 46 20 5.1 Table 19.4 804 Data for Example 19.8 Sometimes you have data that very clearly has two linear trends visible. A certain wind turbine has a swept area of 80 m? This is the thinking that has inspired architects since the times of ancient Egypt and generations of painters, sculptors, musicians, and writers. The zero after the decimal point is also significant. Figure 9.23 The principal axis of a periodic function 331 Modelling real-life phenomena The difference between the graphs of sine and cosine Note that we have only used sine so far. It is often the case that an investor makes regular equal payments into an investment, all of which accumulate interest at an equal annual rate. 31. 17. 4. But, since x = cos (=1,0) Figure 5.21 The Pythagorean Identity and y = sin (), we have xX22=1 (cos 0)2 + (sin )2 = 1 cos?f +sin?6 = 1 This is known as the Pythagorean Identity. 5. (f) Calculate the value of I for which T'is a minimum. This chapter will look at some general characteristics and properties of functions. Using the TVM solver, we make the following entries and solve for the interest rate, I N=6 1% = 285 PV= 60000 PMT =0 FV = 8000 Py=1 cYy=1 PMT: END Note that the negative interest rate corresponds to depreciation. (0)) Show that T'= (@ = Or =5~ a7 (@) Find 47 i dr The lobster trap is designed so that the length of steel used in its frame is a minimum. (1) The model neglects factors that are known to operate in the real-world situation. The sprinkler delivers water at a rate of 800 cm min~'. It follows that an angle of 180 has a radian measure of exactly 7. 3. There are two time zones for the May papers (time zone 1 and time zone 2) and one time zone for the November papers (time zone 0 only). Since we are interested in the volume of the box, it seems appropriate to start with a model for volume: V =Iwh Looking at the second step in the diagram, we can see that part of the width and length of the paper becomes the height for the box. (i) Write down the value of b. Their games played (GP), won (W), drawn (D), and lost (L) over ten seasons from 2008-2009 to 2017~ 2018 are shown in the table. x = ma{d0 ) cm? per om of depth 33. That is kS T and T(0) = T, AT _ 37 ) where & where k > 0 and T, < , i.e,, the initial temperature is less than the temperature kis a constant and of the surrounding medium. 5. Mathematics uses symbols to describe these amazing structures in the basic language of sets and the mappings between them. Unstable. + bx + 56 Sequences and series Learning objectives By the end of this chapter, you should be familiar with o using the formulae for the nth term for arithmetic and geometric sequences + using the formulae for the sum of terms for arithmetic and geometric series + using sigma notation for the sums of sequences applications, including simple interest, compound interest, population growth, annual depreciation and modelling solving problems involving amortisation and annuities using technology. Find the equation of the line that passes through the apex of all such isosceles triangles. (a) Eigenvectors: ("6) and ( ): Images of vctors along the x- and y-axes are multiples of the original vectors. (b) The boarding platform at the lowest point of the Riesenrad is 12 feet above the ground. . h r = radius 22 A 3= At : ase ~ateanf polyponal 3 Apenttuce = sum of the = n lateral faces, each of which is a rectangle Pyramid = Apase + ;Alzumlfue Ay = area of polygonal base 3"= Auenttace = sum of the n lateral faces, each of which is a triangle Cylinder V=mrth S =2mr + 2mrhor r = radius Cone 1, v="Larn S=amr+ r = radius 3 = 2mr(r + h) mrl where | = /2 + 2, 50 alternatively, = height _oe B~ height I'= lateral height S=ar(r+/rr+ ?) Determine the gradient of each line and state the gradient of a line perpendicular to it. State your answer in the form a + bi T o T L T @) z, :6c157and7,2:2clsT () z,= Scls?andQ:chsg z, 16. Applications and Interpretation introduces many new topics and is quite a change from the old syllabus. (b) Linearise the data using logarithms to find the best-fit model for this data, using v for speed and F for fuel consumption. Of course, since a GDC will not perform this calculation, it would have to be done by hand. Add the exponents. Moreover, this is a very public beauty because it can be dissected and discussed. What is the potential difference of the source? For the relationship at the start of this section, we can write: Population P is a function of time #: P(t) = P,(1.02)" As with the population P and the time , many mathematical relationships concern how the value of one variable determines the value of a second variable. 68 Hp " Un1 Example 3.8 For each sequence, state the common ratio and write a recursive formula. 6x dx Three functions of importance to an economist are: the cost function: C(x) = total cost of producing x units of a product during some time period the revenue function: R(x) = total revenue from selling x units of the product during the time period 673 the profit function: P(x) = total profit obtained by selling x units of the product during the time period If all units produced are sold, then P(x) = R(x) Clx) profit = revenue cost The total cost C(x) of producing x units is made up of two parts: overhead or fixed costs, a, and variable cost or manufacturing cost, M(x) C(x) = a + M(x) Ifa firm can sell all the items it produces forp units of money (, , or $, ) each, its total revenue R(x) will be R(x) = px Also, economists call P'(x), R'(x), and C'(x) the marginal profit, marginal revenue, and marginal cost; and they interpret these quantities as the additional profit, revenue, or cost that result from producing and selling an additional unit of the product when production/sales levels are at x units. (d) The number of fish in the pond will not decrease below p. Write down the value of p. . The diagram shows a waterwheel with a bucket. (Ignore any currents in the water.) We say that fis an increasing function. [V =10V 6. For example, the display for the model in Example 9.5 shows how this default view can be very misleading. When f"cx) < 0 forall xin some interval of the domain of f, the graph of fis concave down in the interval. (b) Calculate how long the sprinkler should run in order to provide 2.5 mm of water per square metre. on the same set of axes. These graphs are shown in Figure 9.25. Function g is defined by g(x) = { =22 g% 0=x=2 =D Given that g is continuous at x = 2: (a) find the value of a when b = (b) find the value ofb whena 2 = 3 . Determine the value of each of the following. A scientist studying the how this chemical decays wrote in his notes that the data in an experiment could be modelled with the function A(#) = 500(0.5)" (a) Find A(0) and interpret its value in context. o f(1) = log, 1 = 0, so the graph always has an x-intercept at (1, 0) o The graph y = fx) has a vertical asymptote at x = 0 o The domain of fis x > 0 and its range isy R 26 The decibel (dB) is a unit for measuring the relative loudness of sounds. As you will see in the next section, this method of regression minimises the sum of the squared residuals, S, What can go wrong? The zero after the decimal point is also significant. 5. An arc of length 60 cm subtends a central angle a in a circle of radius 20 cm. What is it about the difference between the methods of the natural sciences and mathematics that accounts for the radical difference in types of knowledge produced? Just as pure research in the natural sciences produced results that could also be used for technological or engineering applications, so in mathematics, problems motivated purely from within the most abstract recesses of the subject (pure mathematics) give rise to very useful techniques for solving problems with strong applications in the world outside of mathematics. (a) Assuming that the reflector is at the topmost position at time t = 0, develop a model for the height of k, in cm, of the reflector above the ground at any time in seconds. V.B=0 3, VxE=-98 at 4 vxH=D17 at Figure6 Maxwells equations It is perplexing that the whole crazy complex universe can be described by such simple, elegant, and even beautiful equations. We can see some evidence of that here, RS RRERERRE mine Figure 19.36 GDC screens for the solution to Example 19.12 821 Bivariate analysis (c) The initial velocity, when the rocket is launched, is vy = 46.4ms~'. . (a) y=0.625 8. Point B is 120 km to the east of point A and 40 km directly south of the boundary. Since the semi-circle formed by the equator measures 180, the arc measure must be 180 47.5 25 = 107.5. 828 (c) When constructing models, we often modify dates to be years since a certain date. Mathematicians often practise their art as art for its own sake. The nth derivative of y with respect to x is denoted by S IFthe notation fix) i used, the frst second and third derivatives are written as f'x), f"(x) and f"(x), respectively. 1) is the composite ofy=u?andu =4x1 d Use the chain rule to find d}/, the derivative of y with respect to x. x e Solution =ul= z =2u J du du =dxl1=>= . x=4d,y=-3 .m=2n=3 . These angles don't make sense in a right-angled triangle, but with our unit-circle definition of the trigonometric functions we can now calculate them. quickly with a GDC. 126 | Solution (a) First we must calculate the arc measure. The key to the code is a very large number that is the product of two primes. Figure 5.11 When the radius ris equal to the arc length s, the measure of the angle is 1 radian 131 Geometry and trigonometry 2 The unit circle When an angle is measured in radians it makes sense to draw it, or visualise it, so that it is in standard position. From the top of a 40 m cliff, the angle of depression of the near bank of the stream below is 72 while that of the far bank is 60. =28m For each of (a) to (d): (i) draw the triangle (ii) indicate which formula(e) and steps would be used to find the missing angles and/or sides and its area. (a) 4,7,12,19, 357 9 L35 gas 60 (b) 2,5,8,11, 135 .9 Wasels 5. The tables give the temperature in a growing chamber at various times since midnight. The changing strength of gravitational force is a less important factor for normal wells. The model is only as good as the strength of the correlation. == Solution (a) Each year the amount in the account increases by 4.5%. Their marginal cost per day is given by the following model MC(x) = 0.0012x2 0.018x + 25 where x is the number of fans produced. @ u,=tu, =g andu, ==1 4a? Students who like sitting down and solving equations and get satisfaction from this The Applications and Interpretation course is for students who are more passionate about social sciences, natural sciences, medicine, statistics, business, psychology and design and have less of a natrual mathematics ability (focused on functions and statistics). What shape will this distribution take? Is the flying speed of animals related to their overall body length? (iii) Find a least-squares regression line for CO, concentration C based on y, years since 1960. In general, if a principal of $P is invested in an account that has an interest rate 7 (expressed as decimal) annually, and this interest is added to the principal at the end of each year, then we can use the geometric sequence formula to calculate the future value A, which is accumulated after t years. Printed in Slovakia by Neografia Acknowledgements The authors and publisher would like to thank the following individuals and organisations for their kind permission to reproduce copyright material. A map that is as detailed as the territory it depicts is no use to anyone. T\ 100 1 ) Sequences and series (b) Sue borrows $5000 at a monthly interest rate of 1% and plans to repay the loan in 5 years (60 months). An IB education also fosters diversity, curiosity and a healthy appetite for learning. (b) Find the number of kilometres from the Equator to the South Pole. Basic definitions Given a right-angled triangle ABC, the sides opposite angles A, B, and C are designated a, b, and c respectively by mathematical convention (Figure 4.7). (a) vote is evenly split A 02395 A 03790 (b) B 04971 6. . 560 ion o, : A The notation o2 Comes from the idea that the first derivative is G e () d}'),dzy svareis 2 ) the second Notice that the dx in the denominator is considered to be a single entity, so we dont write d*x2. (a) () 10. 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In the context ofa mapping, each value in the domain is mapped to its image in the range. This situation can be modelled by the exponential 100 function T = a + b(k~"), where T is the temperature of the water, in C, and m is the number of minutes for which the cup has been placed in the room. Subjects. The clue is that 13 and 17 are prime numbers. Like the 2-sample t-test, this can be done T Observed: [A] Expected: [B] Color calculate Draw [>GOF-Test] .43438914 2182178223 3] [124 8 5] 12 6.8 5.2 s] 11810.27.8 9 Figure 18.19 GDC screens for the solution to Example 18.10 Note that each expected value must be at least 5, as with the y2 GOF test; otherwise, the outcomes will need to be combined. Solution d=13=Jx12F (10 27 = 13" = (x 1)> + (- 12) =169=x>2x+1+144=x>2x24=0 =>(x6)(x+4)=0=>x-6=0o0rx+4=0 =X =G orx4 How to use this book This book is designed to be read by you the student. Figure 2.5 Graph of the piecewise function to model the cost ofa taxi journey A continuous curve is one for which its graph can be sketched without i e Note that the two functions meet at the point (8, 7), so the function is continuous. By the Triangle Inequality, the sum of the lengths of any two sides exceeds the length of the third. $945.23 3. In this context, the horizontal asymptote is not meaningful because it occurs in negative years since 2018, so there doesn't seem to be a useful interpretation of it. The big chain of reasoning above is called a proof. Scribd is the world's largest social reading and publishing site. Function fis defined by fix) = { 2 Ry 3 ax b x =3 Given that fis continuous at x = 3: (a) find the value of a when b = 8 (b) find the value ofb whena = 4 . 5. Figure 2.20 shows that the point (b, @) can be found by reflecting the point (a, b) about the liney = x. Write each equation in logarithmic form. (c) Calculate how long it takes for the temperature of the water to reach 56C. Determine if 9803 is a term in this sequence. W= Xr wy=u, Xr=u XrXr=uXr W=y X r=w XX r=u X1 and so on. 5. To the nearest metre, how much of a head start should the second runner have in order for them to arrive at the opposite corner at the same time? (d) 1.62 X 10 ) 8 0g,256 (e) 9.0x 107 (g) 5.00003 X 10 (i) 1X10m 3=1 login10 %: log,9v3 (8 0=1n1 0 ~2=logss(35) (k) 3=log: 4 64 (f) 3.2001 x 10! () n = 1197 = at the very end of the 12th year (f) ) n=63.5= in the middle of the 64th year (i) 41517 (i) Since 4C o concentration will continue to decrease. (d) Calculate the maximum volume of the open box. The equation ax + by + d = 0 is called the general form of a line. The radius of the wheel is 30 cm. Any angle which is a reflection across the x or y axis toa known angle can be found using this method. Students have the option to choose between two different courses: IB Math Analysis and Approaches (AA) and IB Math Applications and (a) What is the angular velocity of the wheel in degrees per second? (a) Find the amount Phil would owe the bank after 20 years. (b) The wheel turns at a rate of one rotation every 30s. 23. The paper setup for both higher level subjects is the same and the setup for both standard level subjects is the same. (c) Use your GDC to find an appropriate model for this data, with fuel consumption C in terms of speed v. (d) Use your model to predict the fuel consumption of this car at 95kmh~!, Fuel Speed | consumption (kmh-1) | (litres per 100km) 50 96 60 8.9 70 8.3 80 8.0 90 8.1 100 8.7 110 9.8 120 104 Table 19.12 Data for question 4 823 Bivariate analysis (e) Give a reason why it is not reasonable to use this model to predict the fuel consumption at 140 km h~*. IB Applications and Interpretation Formula Sheet. (a) Eigenvalues: v s vy sfov v v p Hovl (h) Eigenvalues: 1, 4, eigemmurs( J %),(2)1 General solution: x=Ce= ' = 2Ce2 y=VICe + Gt Eigenvalues are complex and the real part is positive, the trajectories move away from the origin in a spiral manner, the origin is an unstable focus, also known as asa node. (b) Find the number of years it would take for the amount of money in the account to exceed $2000. If the state of the pieces before the move was legitimate and the move was made according to the rules of the game, then the state of the pieces after the move is also legitimate. (c) 27 The bases are different. (a) -z:%wzw = (=27 9(-22+20=4 (b) f'o0 =3x> 3x> 18x (c) f'(3)=3(3) 3(3)> 18(3) = 0 thereforex = 3isa stationary point. (f) 100.03 (g) 0.002 Give each value correct to 3 significant figures. (i) 1.38(2 ) ~79.068 = 79.1 (3 5.) (b) (i) 135 = 3(45) = 3( (i) 150 = 5(30) = (iid 1750(180") 335:: @) 10(1800) =5 AllGDCs will have degree modeanda radian mode. sample of fermium-253 SR days e the average activity will decrease to 50 Bq. 3. The x and y axes divide the coordinate plane into four quadrants (numbered with Roman numerals). As with other things in the natural world, it is our task to discover it (literally to lift the cover). (a) The LEC must be at (6, 6). 76 40. For example, consider the fishing line data from earlier in this section. 1(3=-4.9-x411-x450) Therefore, the ball hits the ground after 4.51s. 914 We will leave the last word on this subject to Dirac himself, writing in Scientific American in 1963: I think there is a moral to this story, namely that it is more important to have beauty in one equations than to have them fit experiment. Could we allow ourselves to be guided to truth in mathematics because of the beauty of the equations? WebFeaturing a wealth of digital content, this concept-based Print and Enhanced Online Course Book Pack has been developed in cooperation with the IB to provide the most comprehensive support for the new DP Mathematics: applications and interpretation SL syllabus, for first teaching in September 2019. Note that value 5E+4 for the y-coordinate of the vertex is the GDC's version of scientific notation (or standard form). Use the guidance for logarithmic transformations given earlier in Example 19.10 to interpret the rate of change. If the constant k is positive, the model describes population growth; if it is negative, it describes population decay. (b) Find the average cost per unit produced and graph AC(x) and MC(x) on the same set of axes. 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Be done by hand two primes First we must Calculate the arc.!, =g andu, ==1 4a Therefore, the arc measure must be at 6! In the natural world, it would have to be done by hand owe! The success of mathematics in fields such as the strength of the principal axis of the success of in. A very public beauty because it can be found using this method %, Calculate the of... In order to provide 2.5 mm of water per square metre ground after 4.51s SR days e the average will. Pure research that end up having immense practical benefit is mapped to its image in the account by... Using this method money in the range of course, since a GDC will not perform this calculation it.

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