exam Maths Puzzle Numerical Ability

You invest 10,000, part at 6% annual interest and the rest at 9% annual interest. If you received 684 in interest after one year, how much did you invest at each rate?

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exam Other Question

how do u do polynomial of this qusetion g5*g9 Would anyone be kind enough to show the steps and solution to the following?

Simplify. Write answers WITHOUT negative exponents.
(p-5)^-9(p^6)^4
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(p^-8)^0(p^4)^-5