Question 249718
<font face="Garamond" size="+2">


The graph of the height function is a parabola, opening down because of the negative lead coefficient.  The questions asked are nothing more than the coordinates of the vertex of the parabola.


The *[tex \Large x]-coordinate of the vertex of a parabola described by an equation in the form:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ f(x)\ =\ ax^2\ +\ bx\ + c]


is given by


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x_v = \frac{-b}{2a}]


Just plug in your numbers and calculate.


For the second part of your problem, simply calculate *[tex \Large f(x_v)]



John
*[tex \LARGE e^{i\pi} + 1 = 0]
</font>