Select all of the following true statements if R = real numbers, Q = rational numbers, and N = {0, 1, 2, ...).

Which statement justifies why angle ebc measures 90?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false