An injection molding system has a first cost of $180,000, and an annual operating cost of $84,000 in years 1 and 2, increasing by $5000 per year thereafter. The salvage value of the system is 25% of the first cost regardless of when the system is retired within its maximum useful life of 5 years. Using a MARR of 15% per year, determine the ESL and the respective AW value of the system (a) by hand solution, and (b) via spreadsheet that graphs the total AW and its components.

Russell's study compared gpa of those students who volunteered for academic study skills training and those who did not elect to take the training. he found that those who had the training also had higher gpa. with which validity threat should russell be most concerned?

scenario: hawaii and south carolina are trading partners. hawaii has an absolute advantage in the production of both coffee and tea. the opportunity cost of producing 1 pound of tea in hawaii is 2 pounds of coffee, and the opportunity cost of producing 1 pound of tea in south carolina is 1/3 pound of coffee. which of the following statements is true? a. south carolina should specialize in the production of both tea and coffee. b. hawaii should specialize in the production of tea, whereas south carolina should specialize in the production of coffee. c. hawaii should specialize in the production of coffee, whereas south carolina should specialize in the production of tea. d. hawaii should specialize in the production of both tea and coffee.

Braden’s ice cream shop is losing business. he knows that customers are no longer choosing his product because a competing product has become less expensive, yet he has refused to lower his prices. what has happened to braden’s business?