A street light is at the top of a 12-ft-tall pole. A 6-ft tall woman walks...

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A street light is at the top of a 12-ft-tall pole. A 6-ft tall woman walks away from the pole with a speed of 4 ft/sec along a straight path (see figure). How fast is the tip of her shadow moving, in ft/sec, when she is 40 ft from the base of the pole? A street light is at the top of a 12-ft-tall pole. A 6-ft tall woman walks away from the pole with a speed of 4 ft/sec along a straight path (see figure). How fast is the tip of her shadow moving, in ft/sec, when she is 40 ft from the base of the pole?