book Maths Puzzle Numerical Ability

A baseball is hit. Its heigh above the playing field is measured by a sensor. Write an equation to describe the curve of best fit for the data collected by the sensor.
Time, x (s

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book Other Question

The perimeter of a rectangle is to be no greater than 300 in. and the length must be 125 in. Find the maximum width of the rectangle. Simplify.
15x-y-5(3x-2y+5z)