Question

The problem is in the comment

Answer 1

This problem was generated from
http://saab.org

Answer 2

There isn't, and besides, the exams on that site seem to be designed for practice.

Anyway, Green's theorem is very useful here.

Answer 3

\[\int_C\mathbf F\cdot\mathrm d\vec{r}=\iint_D(5-4)\,\mathrm dA=\text{area of the pentagon}\]

Answer 4

Whoops, that should be \(5\color{red}+4\), so the result should be \(9\) times the area.

Answer 5

This site is actually mine

Answer 6

nice, can I get some SAT practice on your site?