The area of a parallelogram is:

\(\displaystyle{A}={b}{h}\)

From the given, b=150 miles and \(\displaystyle{h}={0.14}{\left({150}\right)}={21}\) miles. Hence,

\(\displaystyle{A}={\left({150}\right)}{\left({21}\right)}\)

\(\displaystyle{A}={3150}{m}{i}^{{{2}}}\)

\(\displaystyle{A}={b}{h}\)

From the given, b=150 miles and \(\displaystyle{h}={0.14}{\left({150}\right)}={21}\) miles. Hence,

\(\displaystyle{A}={\left({150}\right)}{\left({21}\right)}\)

\(\displaystyle{A}={3150}{m}{i}^{{{2}}}\)