book Maths Puzzle Numerical Ability

{{{(x-2)^2/9+(y-4)^2/25=1}}} This equation defines an ellipse with center (_, _). The major axis has length and the minor axis has length .

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book Other Question

Find the vertex and focus of the Parabola whose equation is 4(y-2) = (x-4) ^2.

Thank you for your help! I'm on a planet that is a smooth sphere 25,000 miles in circumference. There is a string, perfectly inelastic and nearly weightless, tied firmly around the planet on a great circle