Solve the Problem $\mathrm { ft }$ Intervals (X), as Shown in the Table

Multiple Choice

Solve the problem.
-A surveyor measured the length of a piece of land at 100 - $\mathrm { ft }$ intervals (x) , as shown in the table. Use Simpson's Rule to estimate the area of the piece of land in square feet.
$\begin{array}{l|l}\mathrm{x} & \text { Length (ft) } \\\hline 0 & 40 \\100 & 50 \\200 & 70 \\300 & 45 \\400 & 40\end{array}$

A) $21,000 \mathrm { ft } ^ { 2 }$
B) $20,500 \mathrm { ft } ^ { 2 }$
C) $20,000 \mathrm { ft } ^ { 2 }$
D) $24,500 \mathrm { ft } ^ { 2 }$