The graph below shows the total cost of an internet subscription, c, as it relates to the number of internet hours used, h. how much does the company charge per hour? the company charges $ per hour.   

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?