\documentclass[12pt]{report} 

\usepackage{palatino}
\usepackage{epsfig}

\pagestyle{empty} %%% this results in no pagenumbers (footer is empty}

\addtolength{\oddsidemargin}{-1.0in}
\addtolength{\evensidemargin}{-1.0in}
\addtolength{\textwidth}{1.5in}
\addtolength{\topmargin}{-0.5in}
\addtolength{\textheight}{1.0in}

\baselineskip=20pt

\newcommand{\dsps}{\displaystyle}
\newcommand{\pp}{\par \noindent}
\newcommand{\newp}{\vfil \eject}
%\newcommand{\newp}{\bigskip}

\begin{document}

\noindent
\vfil \noindent
\large
\hfil Math 120 D - Autumn 2007 \hfil \pp
\hfil Mid-Term Exam Number One\hfil  \pp
\hfil October 18, 2007 \hfil \pp
\hfil Answers \hfil \pp
\normalsize

There were two versions of the test.

Version 1 - Robert's speed in problem 1 was 4 km/hr.

\begin{enumerate}

\item 3.74757 hours after noon

\item 0.6799001 km

\item Two answers were acceptable due to the unintended
inclusion of both inches and cm in the problem.
\[
area(x) = \left\{ \begin{array}{ll}
	\frac{1}{4}x^2 & \mbox{if $0 \le x \le 8$} \\
	4x-16   & \mbox{if $8 \le x \le 14$} \\
	\end{array}
	\right.
\]
or
\[
area(x) = \left\{ \begin{array}{ll}
	\frac{1}{4}x^2 & \mbox{if $0 \le x \le 8$} \\
	4x-16   & \mbox{if $8 \le x \le 23.24$} \\
	\end{array}
	\right.
\]

\item The smaller enclosure should be 50 meters long 
in the direction parallel to the river, and 37.5 meters long in the
other direction.


\end{enumerate}

Version 2 - Robert's speed in problem 1 was 5 km/hr.

\begin{enumerate}

\item 5.064602 hours after noon

\item 0.6772854 km

\item Two answers were acceptable due to the unintended
inclusion of both inches and cm in the problem.
\[
area(x) = \left\{ \begin{array}{ll}
	\frac{1}{4}x^2 & \mbox{if $0 \le x \le 8$} \\
	4x-16   & \mbox{if $8 \le x \le 14$} \\
	\end{array}
	\right.
\]
or
\[
area(x) = \left\{ \begin{array}{ll}
	\frac{1}{4}x^2 & \mbox{if $0 \le x \le 8$} \\
	4x-16   & \mbox{if $8 \le x \le 23.24$} \\
	\end{array}
	\right.
\]

\item The smaller enclosure should be 30 meters long 
in the direction parallel to the river, and 22.5 meters long in the
other direction.

\end{enumerate}


\end{document}