Rancher wants to fence in an area of 3 square feet in a rectangular field and then divide it in half with a fence down the middle, parallel to one side. what is the shortest length of fence that the rancher can use?

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?