Cost of Trans-Atlantic Travel A Boeing 747 crosses the Atlantic Ocean (3000 miles) with an airspeed of 500 miles per hour. The cost C (in dollars) per passenger is given by 36,000 C(x) = 100 + 10 where x is the groundspeed (airspeed t wind). (a) What is the cost when the groundspeed is 480 miles per hour? 600 miles per hour? (b) Find the domain of C. (c) Use a graphing utility to graph the function C = C(x). (d) Create a TABLE with TbIStart = 0 and ATbl = 50. (e) To the nearest 50 miles per hour, what groundspeed minimizes the cost per passenger?

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