The Classic Car Co. has a before-tax cost of debt capital of 9%, a cost of preferred stock of 10%, a cost of equity capital of 14%, and a marginal tax rate of 40%. The market values of its debt, preferred stock and common stock are $40 million, $20 million, and $60 million respectively. Therefore, for evaluating average risk projects, the manager should use a discount rate of . (Do not round intermediate calculations. Round final answer to two decimal places.)

Amachine purchased three years ago for $720,000 has a current book value using straight-line depreciation of $400,000: its operating expenses are $60,000 per year. a replacement machine would cost $480,000, have a useful life of nine years, and would require $26,000 per year in operating expenses. it has an expected salvage value of $130,000 after nine years. the current disposal value of the old machine is $170,000: if it is kept 9 more years, its residual value would be $20,000. calculate the total costs in keeping the old machine and purchase a new machine. should the old machine be replaced?

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True or false: a fitted model with more predictors will necessarily have a lower training set error than a model with fewer predictors.