Question: 14. A controller in an air traffic control tower sees that Airplane A is 15 km from the tower in a direction 30 east of

14. A controller in an air traffic control tower sees that Airplane A is 15 km from the tower in a direction 30 east of north, and Airplane B is 16 km from the tower in a direction 40 east of north. If the two airplanes are less than 2 km apart from each other, the controller must file a report. Is a report necessary? [A; 5 marks] 15. Steven borrowed $5000 from the bank to purchase a used car. He wants to repay the loan in 6 years. The bank charges 6.3% per year compound interest. Determine the amount owing after 6 years if the interest is compounded semi-annually. [A; 5 marks] 16. The half-life of a radioactive substance is 5 days. Suppose that you start with a 320-mg sample of the substance. How much of the substance will remain after 1 month? [A; 4 marks]

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