A rin is 1/10 of a sen, which is 1/100 of which currency unit?

Which Rhodes Scholar from New Hampshire joined the U.S. Supreme Court in 1990? A rhyme says "Make new friends, but keep the old; one is silver and the other..." what? A rhytidectomy is the medical term for which cosmetic procedure? What rich, buttery, crumbly cookie is a Scottish favorite? What kind of ring does a baby chew on when its incisors come in? What is a ring-shaped cake pan with fluted sides called? A river in which state is named for the Rappahannock tribe that John Smith met in 1607? A river is named for which Scottish-born explorer, the first European known to cross North America north of Mexico?