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Mathematics 11 Online
OpenStudy (anonymous):

A rock was dropped from a platform on a tower 55 feet above a lake. The rock landed on the bottom of the lake, which was 21 feet under the surface of the lake. Where was the rock when it had fallen halfway? 34 feet above the lake 38 feet above the lake 10.5 feet below the surface of the lake 17 feet above the lake

OpenStudy (anonymous):

38 feet above

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