If a 4-inch, schedule #40 threaded pipe is threaded 31/2 turns into a fitting, how much of the pipe length will be inside the fitting?

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

The difference between tax advoidance and tax evasion

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.