3. laramie trucking's ceo is considering a change to the company's capital structure, which currently consists of 25% debt and 75% equity. the cfo believes the firm should use more debt, but the ceo is reluctant to increase the debt ratio. the risk-free rate, rrf, is 5.0%, the market risk premium, rpm, is 6.0%, and the firm's tax rate is 40%. currently, the cost of equity, rs, is 11.5% as determined by the capm. what would be the estimated cost of equity if the firm used 60% debt? (hint: you must first find the current beta and then the unlevered beta to solve the problem.)

Total marketing effort is a term used to describe the critical decision factors that affect demand: price, advertising, distribution, and product quality. define the variable x to represent total marketing effort. a typical model that is used to predict demand as a function of total marketing effort is based on the power function: d = axb suppose that a is a positive number. different model forms result from varying the constant b. sketch the graphs of this model for b = 0, b = 1, 0< b< 1, b< 0, and b> 1. (we encourage you to use excel to do this.) what does each model tell you about the relationship between demand and marketing effort? what assumptions are implied? are they reasonable? how would you go about selecting the appropriate model?