In Exercises 105–108, you will be developing functions that model given conditions.

You commute to work a distance of 40 miles and return on the same route at the end of the day. Your average rate on the return trip is 30 miles per hour faster than your average rate on the outgoing trip. Write the total time, T, in hours, devoted to your outgoing and return trips as a function of our rate on the outgoing trip, x. Then find and interpret T(30).

Time traveled Distance traveled Rate of travel