Rank the four geological erars according to what you believe is the order of the era that has had the most impact on the development of the planet to the one that has had the least influence. Support your choices with specific examples.​

What was the most difficult obstacle to overcome in the creation of an autonomous state after indian independence was achieved? a british willingness to go to war to retain the region b. religious differences between hindus and muslims c. ethnic differences between tribal regions d. indian princes' inability to decide on a format of government

Explain the value of statistics and other data to positive economics and to normative economics

What is the approximate chemical composition of the solar nebula?