Suppose the height of an object is given by $\displaystyle {h}{\left({t}\right)}=-{9}{t}^{{2}}-{5}{t}+{1}$ meters, $\displaystyle {t}$ seconds after an experiment begins.

How rapidly is the object moving $\displaystyle {8}$ seconds after the experiment begns?

The object is moving at Select an answer meters seconds/meter seconds meters/second

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