If anyone can help that would be amazing since I'm super stuck for answers. I have to explain why the earth has layers but have no idea how to answer-

What was istanbul called before he ottomans conquered the city in the 15th century

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 does the kyoto protocol aim to reduce