The longer the time horizon of a project, the more important choosing the right discount rate is

If the current margin is greater than the desired margin,

a. MR=MC b. MR>MC c. MR

In the short-run macro model, the change in inventories will

a. equal output minus aggregate expenditures b. trigger a price change c. equal investment minus depreciation d. equal sales minus investment e. be matched by an equal and opposite change in the subsequent period