How many geographical halves is the world divided into?

What are seismic dampers and why are they important?

Alaina wants to decide whether her current cell phone plan is better than a package that another company offers. to compare the two plans, she plotted two lines on a graph, where y represented the total cost of one month’s service and x represented the megabytes of data that she used in a month. which part of the graph will represent the cost per megabyte of data used in each plan?

What could the united states of america do to improve their status? name at least 3(ap human geography)