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{\LARGE{
\hfil Math 120 A - Autumn 2014 \hfil \pp
\hfil Mid-Term Exam Number One\hfil  \pp
\hfil October 16, 2014 \hfil \pp
\hfil Answers \hfil \pp
}}

There were two versions of the exam in use.

Version A - In problem 1, the Circular Forest has a radius of $8$ km.

\begin{enumerate}

\item (a) $19.91602$ km (b) $1.2649$ km

\item (a) $9$ (b) $5-8x-4h$

\item 
\[
A(x) = \left\{ \begin{array}{ll}
6x & \text{if } 0 \le x \le 4, \\
24+\frac{1}{2}(x-4)(10+\frac{1}{2}x) & \text{if } 4 \le x \le 10.
\end{array}
\right.
\]

\item (a) $x=1+1.25 t, y=-3+2.75t$ (b) $7.0434$ m/sec.
\end{enumerate}

Version B - In problem 1, the Circular Forest has a radius of $5$ km.

\begin{enumerate}

\item (a) $14.818658$ km (b) $0.4472$ km
\item (a) $3$ (b) $8-14x-7h$
\item 
\[
A(x) = \left\{ \begin{array}{ll}
5x & \text{if } 0 \le x \le 3, \\
15+\frac{1}{2}(x-3)(7+x) & \text{if } 3 \le x \le 9.
\end{array}
\right.
\]
\item (a) $x=-5+1.1t, y=2+0.5t$ (b) $0.71084175$ m/sec.

\end{enumerate}


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