Financial aid staff at a local university are studying issues affecting student debt. They noticed that students who own more credit cards tend to have larger combined debt balances. Which variable (number of credit cards owned or combined debt balance) is the explanatory (predictor) variable in this context?

"in my opinion, we ought to stop making our own drums and accept that outside supplier's offer," said wim niewindt, managing director of antilles refining, n.v., of aruba. "at a price of $21 per drum, we would be paying $4.70 less than it costs us to manufacture the drums in our own plant. since we use 70,000 drums a year, that would be an annual cost savings of $329,000." antilles refining's current cost to manufacture one drum is given below (based on 70,000 drums per year):

Why should managers invest any excess cash

Which of the following has the largest impact on opportunity cost