A rock is projected directly upward from ground level. After t seconds, its height (if air resistance

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A rock is projected directly upward from ground level. After t seconds, its height (if air resistance is neglected) is modeled by the function


image


Why does the question in Exercise 54 have two answers?



Data from in Exercise 54


After how many seconds will it be 240 ft above the ground?

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Related Book For  answer-question

Intermediate Algebra

ISBN: 9780134895987

13th Edition

Authors: Margaret Lial, John Hornsby, Terry McGinnis

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