Calculate the difference between the cost of a used brain and an unused brain

Which was not a country that massively built up its navy in the early 1900s? germany china united statesbritain

The caste system in india was used for what purpose? a) to ensure that all people had an adequate income b) to prevent the rich from taking too much power c) to provide social control and conformity according to one’s birth d) to draft a military capable of defending india from mongol invasion

Which geologic feature is composed of the youngest crystal bedrock