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Mathematics 9 Online
OpenStudy (anonymous):

The function d(s) = –5s – 15 models the depth, in feet, of a rock that Dante dropped into a lake s seconds after he lost sight of the rock. What is the meaning of the x-intercept? Dante saw the rock for 15 s before losing sight of it. Dante saw the rock for 3 s before losing sight of it. Dante lost sight of the rock when it was 15 ft below the lake’s surface. Dante lost sight of the rock when it was 3 ft below the lake’s surface.

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