After sally's income increased from $12,000 to $16,000 per year, her purchases of cds increased from 40 to 60 per year. using the midpoint method, one decimal place, and the negative sign if necessary, her income elasticity for cds is

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european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.