Question 4 20 marks This question is based on your work on MU125' up to and including Unit 2. (a) A drone begins its descent to the ground from a height of 120 In. The drone descends steadily, at a rate of 2 m per second. (1) Using this information, complete a copy of the table below. Time, T, in seconds 0 5 10 20 35 5D 60 Height of drone, H, in metres (ii) Mark the points from part (i) on a graph, with the vertical axis showing H, the height of the drone in metres, and the horizontal axis showing T, the time in seconds. Draw a line through these points. You will nd the tips for drawing graphs on page 96 of Unit 2 useful. You can draw your graph either by hand { using graph paper) or using a computer. (iii) Explain how you could use your graph to nd the time when the drone's height is 70 In. How long does the drone take to descend to this height? (h) A bottle return scheme in Germany pays 0.25 for each plastic bottle returned and 0.12 for each glass bottle returned by its customers. (i) Calculate how much a customer would receive if they return seven plastic bottles and four glass bottles. (ii) Explain in words how you would calculate the total amount received if the number of plastic bottles returned is p and the number of glass bottles returned is g. Hence write down a formula for T, the total amount received in , if p plastic bottles and 9 glass bottles are returned. (c) Find the value of 62 E when a 0.3, b 0.6 and c U.5. k=2(a1) Give your answer correct to three signicant gures. [5] [1] [3] [5]