With the universe of discourse for x as the set of all peopl…

With the universe of discourse for x as the set of all people alive in the world and the universe of discourse for y as the set of all countries in the world, we define the following predicates: F(x) is “x is a current FSU student,” G(x) is “x is a graduate of FSU,” and R(x, y) is “x is a resident of y.” Which of the following logical expressions accurately expresses this statement: Some residents of the United States are graduates of FSU and some residents of the United States are not graduates of FSU.

The pet shop in Mochdewton sells only guinea pigs and hamste…

The pet shop in Mochdewton sells only guinea pigs and hamsters. Each guinea pig costs twice as much as a hamster. A local elementary school purchased 5 guinea pigs and 3 hamsters. If the transaction had been for 3 guinea pigs and 5 hamsters, the cost would have been $10 less. What is the price of a guinea pig?  [GuineaPig] What is the price of a hamster?   [Hamster]   Adapted from “The Lady or the Tiger? and other logic puzzles” by Raymond M. Smullyan