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18 October, 02:16

Jenny used the expression - 16x2 + 38x + 5 to determine the height of an object x seconds after it was hit into the air. Write an inequality to represent the interval of time that the object was in the air.

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  1. 18 October, 02:21
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    0 < x < 2.5

    Step-by-step explanation:

    -16x² + 38x + 5 = 0

    -16x² + 40x - 2x + 5 = 0

    -8x (2x-5) - 1 (2x-5) = 0

    x = - ⅛, 2.5

    0 < x < 2.5
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