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    Projectile Time Calculation

    The equation $ y = -16t^2 - 60t + 54 $ describes the height (in feet) of a ball thrown downward at 60 feet per second from a height of 54 feet from the ground, where $ t $ represents time, measured in seconds. In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest hundredth.

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    • $\frac{a}{b}$
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    • 0
    • =
    • %
    • $a^n$
    • $a^{\circ}$
    • $a_n$
    • $\sqrt{}$
    • $\sqrt[n]{}$
    • $\pi$
    • $\ln{}$
    • $\log$
    • $\theta$
    • $\sin{}$
    • $\cos{}$
    • $\tan{}$
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    • $)$
    • $[$
    • $]$
    • $\cap$
    • $\cup$
    • $,$
    • $\infty$

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