If a firm reduces the price of its product from $6 to $4 and the quantity demanded of the product increases from 45,000 to 55,000 units per week, then the arc price of elasticity is equal to a. –10. b. –0.5. c. 0. d. –1.

Western electric has 32,000 shares of common stock outstanding at a price per share of $79 and a rate of return of 13.00 percent. the firm has 7,300 shares of 7.80 percent preferred stock outstanding at a price of $95.00 per share. the preferred stock has a par value of $100. the outstanding debt has a total face value of $404,000 and currently sells for 111 percent of face. the yield to maturity on the debt is 8.08 percent. what is the firm's weighted average cost of capital if the tax rate is 39 percent?