Why is the trail of tears often called a national tragedy?

97 points what types of changes have been made in the united states to protect people from earthquakes? a. communities are no longer located along fault lines. b. building codes ensure that structures can withstand shaking. c. warnings go off when an earthquake is expected, and people evacuate the area. d. barriers have been built to prevent flooding by a tsunami.

The structure of the federal bureaucracy is well-known as being large and complex. which of the following is not part of the federal bureaucracy?

How many soultions does the system of equations have y= -6x + 330x + 5y = 15a.one b.twoc.infinity manyd.none