exam Maths Puzzle Numerical Ability

Simplify the following expression. (-xt^2)(-2x^2t)^4

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Sam earned 1155 in interest on a total investment 15000 this past year, if part of the money was invested at 6% and the remainder at 9% how much was invested at 6% Plumbing: A 4-ft -high cylindrical pipe has a diameter of 3 in. If water weighs 62.4 lb/ft cubed, what is the weight of water in the pipe when filled to the top? Hint: change the