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Mathematics, 15.04.2020 23:28 meowmeowcow

Arianna 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 - inches per second. If Arianna holds her hand 7 feet above the lake's surface, how far from Arianna's hand is the rock 8
seconds after it hits the surface?

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