29. Firms that have many divisions with different lines of business do not use a companywide WACC to evaluate projects. True False 30. The of a firm's debt can be used as the firm's current cost of debt. A. yield to maturity B. current yield c. discount yield D. coupon rate 31. A homeowner in a sunny climate has the opportunity to install a solar water heater in his home for a cost of $2,800. After installation the solar water heater will produce a small amount of hot water every day, forever, and will require no maintenance. How much must the homeowner save on water heating costs every year if this is to be a sound investment? (The interest rate is 9% per year.) A. $267 B. $297 C. $252 D. $282