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a spotlight on the ground shines on a wall 12 m away. if a man 2 m tall walks fr...
Mathematics, 13.12.2019 09:31, Nerdymania
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a spotlight on the ground shines on a wall 12 m away. if a man 2 m tall walks from the spotlight toward the building at a speed of 2.1 m/s, how fast is the length of his shadow on the building decreasing when he is 4 m from the building?
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