Multiple Choice
Ballard's Glass Company has a variable demand. Historically, its demand has ranged from 10 to 20 windows per day with an average of 15. John Ballard works eight hours a day, five days a week. Each order is one window and each window takes 26 minutes.
What is the average waiting time, in minutes?
a. 1.6
b. 4.4
c. 28.2
d. 56.3
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