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Mathematics, 11.09.2019 00:20 ash848

Lisa is standing on a dock beside a lake. she drops a rock from her hand into the lake. after the rock hits the surface of the lake, the rock's distance from the lake's surface changes at a rate of −6 inches per second. if lisa holds her hand 6 feet above the lake's surface, how far from lisa's hand is the rock 7 seconds after it hits the surface?

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