What is the opportunity cost to increase truck production from 10 million to 30 million?

What does this quotation from the introduction of thedeclaration of independence do?

Immigrants arriving in the united states during the late 1800s experienced many difficulties. which of the following was a problem which large numbers of immigrants faced?

Francisco loves to learn, but his lack of english makes him feel “nervous and scared.” why is he both happy and scared of school