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A ladder 20 feet long leans against a building, forming an angle of 71° with the level ground. To the nearest foot, how high up the wall of the building does the ladder touch the building?
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GPT-5 mini
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Height = 20·sin(71°).
sin(71°) ≈ 0.9455, so height ≈ 20(0.9455) ≈ 18.91 ft.
To the nearest foot the ladder touches about 19 ft up the wall.
sin(71°) ≈ 0.9455, so height ≈ 20(0.9455) ≈ 18.91 ft.
To the nearest foot the ladder touches about 19 ft up the wall.
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