Near a buoy, the depth of a lake at the point with coordinates (x,y) is ==...

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Near a buoy, the depth of a lake at the point with coordinates (x,y) is == f(x,y) = 200+0.02-0.001y", where z, and are measured in meters. a) Find Vf(r.v). b) A fisherman in a small boat starts at the point (80.60) and moves toward the buoy, which is located at (0,0). Is the water under the boat getting deeper or shallower when be departs? Explain. c) In which direction does the depth decrease fastest at point (80,60) ? Near a buoy, the depth of a lake at the point with coordinates (x,y) is == f(x,y) = 200+0.02-0.001y", where z, and are measured in meters. a) Find Vf(r.v). b) A fisherman in a small boat starts at the point (80.60) and moves toward the buoy, which is located at (0,0). Is the water under the boat getting deeper or shallower when be departs? Explain. c) In which direction does the depth decrease fastest at point (80,60) ?

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