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An individual may feel better before completing a full course of antibiotics, however, this does not mean that all of the bacteria in the body have been destroyed.

Mark wants to borrow money to buy a car. His bank offers him a loan of £5,000 to be payed back over 3 years at 4% compound interest. a) Work out the interest acquired in the 2nd year. b) In total how much will Mark end up paying back the bank?