Ships passing through the Panama Canal must travel through Lock. Miraflores
Gatún
Culebra

Arguably one of the most important inventions of the 20th century was a) the transistor. b) air conditioning. c) the vacuum cleaner. d) radio broadcasting.

Which of the following best describes a historical interpretation? o a. an unfair prejudice held by earlier cultures b. a source created in the ancient past o c. a conflict between ancient civilizations o d. an explanation for why a past event happened

In an industry in which there are several providers of a type of good, why can one business not charge much higher prices for their goods?