A airplane crosses the Atlantic Ocean (3000 miles) with an airspeed of 600 miles per hour. The cost C (in dollars) per passenger is given by...

C(x)= 150 + x/20 + 36,000/x

Where x is the ground speed (airspeed plus or minus wind).

a. What is the cost per passenger for quiescent (no wind) conditions?

b. What is the cost per passenger with a head wind of 50 miles per hour?

c. What is the cost per passenger with a tail wind of 100 miles per hour?

d. What is the cost per passenger with a head wind of 100 miles per hour?

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  1. ground speed (x) = 600 +- wind speed

    then use the formula, Tail wind add wind speed, headwind, subtract.

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