The length of a rectangle is 6 more than 2 times it’s width. The area of the rectangle is 36cm^2. What is the length and width of the rectangle

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?