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10-09-2019
Mathematics

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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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JoelG3377 JoelG3377

10-09-2019

Answer:

-48 feet

Step-by-step explanation:

7*(-6) = 42 feet under the surface. Add an extra 6 feet from the distance to her hand and it is -48 feet.

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