<PRE><B>Question 708461</B>
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What planet are you on?  The acceleration due to gravity on earth is -32 ft per second per second, so if you are on earth and using feet as your unit of distance measure then the height function is *[tex \LARGE h(t)\ =\ -16t^2\ +\ 81].  Wherever you are performing this experiment, it isn&#39;t even in our solar system.


Be that as it may, the hint for solving your problem as stated is:  The height of the ground is zero.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
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My calculator said it, I believe it, that settles it
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