exam Maths Puzzle Numerical Ability

a track is in the shape of a rectangle and two semicircles . the ractangle is 4 yards by 10 yards to the nearest yard what is the perimeter if the track

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please help:what is the equation of the axis of symmetry of the graph y=3x^2+12x-2 I need someones help desperately. I need to create an equation or inequality that could be used for analysis, prediction or decision making.

I have chosen to create an equation