37. A company's annual cost of equity is 10 percent per year, the yield to maturity on its debt is 5 percent, and its marginal corporate tax rate is 40 percent. The firm has a market value of $500 million in equity and $500 million in debt. What is the company's after-tax weighted average cost of capital? A. 6.0% B. 6.5% C. 7.5% D. 10.0% 38. Which of the following is a potential use of blockchain technology? A. Developing product recommendations based on user online activity. B. Creating online videos C. Encrypting large volumes of data D. Tracking banking transactions