exam Maths Puzzle Numerical Ability

Write equation for a parabola with a focus at (0,5) and a vertex at (0,0)

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exam Other Question

When x number of units are sold, the price of each unit (in dollars) is given by p = -x/2 + 75. Find the unit price when the following quantities are sold: 2,7,9,11. the sum f two consecutive positive integers is les than 92.Find the pair with he greatest sum.