Cause im like super dumb \(0_0)/ what is .0909090909 simplified

Which of the following best describes the delian problem?

Which graph has a rate of change of zero

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?