What is the mean of 18.1, 17.9, 16.8, 18.7, 15.1

To which set of numbers does the number –5 belong? select all that apply. integers natural numbers rational numbers real numbers whole numbers

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?