The conference will begin at 8:30 a. m. and will last 6 hours 45 minutes. What time will the conference be over?

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?