As partial credit will be given in some cases, please answer questions completely and provide explanations where appropriate. Make sure you circle or otherwise clearly denote your answers. The question should be solved with clear steps and minutely detailed explanation.

2. Chapter 1: For each long-distance call anywhere in the continental United States, a new phone service will charge users 30 cents per minute for the first two minutes and 2 cents per minute for additional minutes in each call. Tom's current phone service charges 10 cents per minute for all calls, and his calls are never shorter than 7 minutes. If Tom's dorm switches to the new phone service, what will happen to the average length of his calls