Which ordered pair could be removed so that the set of ordered pairs is a function?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

What’s the domain of this function? fast

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.