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A small aerial vehicle moving in the +x direction reduces its altitude at a constant rate...

A small aerial vehicle moving in the +x direction reduces its altitude at a constant rate of .5 m/s as it travels along a path described for a short distance by the equation y=100/x^(.2). Where x and y are in m. When x=50m, find; a) the vehicles speed b) how fast the vehicle's speed is changing in time, and c) the vehicles acceleration perpendicular to its flight path.

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