Simplify $$\(k+k+k+k\)$$ (1) (b) (i) Write $$\(f\)$$ as a single power of 9 (ii) Write $$\(f\)$$ as a single power of 3 (2) (c) Write $$\(5^{17} \times 5^{2}\)$$ as a single power of 5 (1) (d) Write 800 as a product of its prime factors. Show your working clearly. (2)

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