Last year Sean had a rectangular garden that measured 6 feet by 4 feet. This year, he wants to increase the perimeter by 40% and plans to increase each dimension by equal amounts. He writes the equation 2(6 + x) + 2(4 + x) = 28 to model this situation.

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?