Social Sciences When 10 cars per minute, on average, are arriving at the entrance to an am...

Social Sciences When 10 cars per minute, on average, are arriving at the entrance to an amusement park and the average number being admitted per minute is x (with x > 10), then the average waiting time in minutes for each car is given by

(a) Reduce this fraction to lowest terms.

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(b) Use the reduced fraction to determine the average waiting time in seconds when x = 11, 15, and 20.

*L. Haefner, Introduction to Transportation Systems. (New York: Holt, Rinchart and Winston, 1986).