What is the following product? (√12+√6)(√6-√10) a) 6√2-2√30+6-2√15 b) 6√3-6√5 c) 3√2-√22+2√3-4 d) 2√3+6-2√15

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?