exam Maths Puzzle Numerical Ability

can somebody help me with this question?

write the equation of the hyperbola in standard form having the given properties

center(0,0); vertices(+_3,0); foci(+_5,0)

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exam Other Question

FROM A SQUARE PIECE OF CARDBOARD WITH WIDTH x INCHES, A SQUARE OF WIDTH x-3 INCHES IS REMOVED FROM THE CENTER. WHAT IS THE AREA OF THE REMAINING PIECE AS A FUNCTION OF x. What is the surface area of a cube if it has an edge of 6 inches?