exam Maths Puzzle Numerical Ability

An astronaut standing on the surface of the moon throws a rock upward. The height of the rock is given by s=-2.7t^2+27t+6.3, where s is the height in metres and t is the time in seconds.What was the initial height of the rock?

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exam Other Question

Combining all four operations of polynomials, can this be solved or simplified?

[9x^2 - (3/4)x] - [(1/2)x - 4]

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