In potassium-argon dating, how does the proportion of remaining potassium in a rock or fossil change over time?

in which two ways were the northeast woodland indians and the southeast indians similar? both collaborated to form the iroquois confederacy. both cultivated the crops of corn, beans, and squash. both lived in rich environments of swamps and rivers. both lived in tree-bark dwellings called wigwams. both expected men to hunt, while women farmed.

i believe all of them orginate from the house of representatives.