What technology is used by Gast in the painting to convey the message about
expanding West?

Gast uses his painting to tell the message that the United States is destined to expand West. Technology, such as railroads and telegraph wires, is moving west as well as many people. Gast is trying to encourage interest in moving west.

some american cities felt workers were being oppressed by business monopolies

the founding fathers did not think women were asmportant as mern were and men could do more and better things then women