The amount of time workers spend commuting to their jobs each day in a large metropolitan city has a mean of 70 minutes and a standard deviation of 20 minutes. Assuming nothing is known about the shape of the distribution of commuting times, what percentage of these commuting times are between 30 and 110 minutes?

The Green Carpet has current liabilities of $72,100 and accounts receivable of $107,800. The firm has total assets of $443,500 and need fixed assets of $323,700. The owners' equity has a book value of $191,400. What is the amount of the net working capital?

a. $50,100 b. $47,700 c. $6,500 d. -$18,800 e. -$29,700

Geminia Systems, a manufacturer of car components, wants to set up a system that will help in sending invoices to its customers once orders for input supply are placed. Which of the following should the company use to perform this function?

A. Computer-aided design system B. Lean production C. Just-in-time inventory system D. Electronic data interchange E. Social networking