exam Maths Puzzle Numerical Ability

the tour de france is a famous cycling race held each year, mostly in France. The 2001 race, which was won by Lance Armstrong of the US, included 20 stages of various lengths for a

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50. A rock is thrown from the top of a tall building. The distance in feet, between the rock and the ground t seconds after it is thrown is given by d= -16t^2-2t+524. How long after the rock is thrown is it 321 feet from the ground? f(x)=1/x^4+3x^3 even or odd
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