Question 328904
<font face="Garamond" size="+2">


The first thing you have to do is to write your formula correctly.


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ S\ =\ 2\pi{r^2}\ +\ 2\pi{rh}]


instead of


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ S\ =\ 2\pi^2\ +\ 2\pi{rh}]


Each term has a 2, each term has a *[tex \Large \pi], and each term has at least one *[tex \Large r], so:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ S\ =\ 2\pi{r}\left(r\ +\ h\right)]


Next, plug in a 5:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ S\ =\ 2\pi{r}\left(r\ +\ 5\right)]


And now you have an expression for *[tex \Large S] in terms of *[tex \Large r]


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