Which is the oldest?

a.
precambrian

b.
mesozoic

c.
paleozoic

d.
cenozoic

Which statement about the stamps is correct?

Which form of relativism states that people rely on their own standards of right and wrong when making a decision?

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?