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A street light is at the top of a 20 ft pole. A 6 ft tall girl walks along a straight path away from the

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A street light is at the top of a 20 ft pole. A 6 ft tall girl walks along a straight path away from the pole with a speed of 6 ft/sec. At what rate is the tip of her shadow moving away from the light (ie. away from the top of the pole) when the girl is 36 ft away from the pole?Answer.How fast is her shadow lengthening?

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