A 30 foot ladder leans against a wall. The foot of the ladder makes an angle of 60° with the ground. How high up the wall does the top of the ladder reach?

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