(a)
\Observe the figure:
\Here and
.
,
,
,
,
,
,
,
and
.
Trapezoidal rule: .
Substitute the corresponding values.
\The area of the oil spill square-feet.
(b)
\Simpsons rule:
The area of the oil spill square-feet.
(a) The area of the oil spill square feet.
(b) The area of the oil spill square-feet.