Question 1082453
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When the ball hits the ground, the value of the function is zero, because zero is the height of the ground.


Set the function equal to zero and solve the quadratic equation.  One of your roots will be zero since this is a very poor model of the real world situation.  This model assumes that the ball was hit when it was touching the ground.  So your answer to the first question is the non-zero root of the equation.


There are two ways to answer the second question.  Use algebra to find the *[tex \Large x] coordinate of the vertex of the parabola or use calculus and take the first derivative, set it equal to zero, and solve.  Either way, find the value of the function at the vertex.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  

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