Which object is defined using a directrix and a focus

Conic sections are defined using a directrix (a fixed line used in describing a curve or surface) and a focus, and those are: parabola, ellipse, and hyperbola.

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answer

false

explanation

these practices describe the manner the land use outcome is attained. land management methods implemented by corporations are a mandatory because they are a driver for better land use results economically, socially and environmentally. corporations are required to understand the connection between land use , and land management practices to support sustainable land use policies