14. Which method of estimating capital projects assumes that cash inflows can be invested at the discount rate? a. payback period. b. net-present value. c. internal rate of return d. profitability index 15. If the discount rate that is used to evaluate a project is equal to the project's internal rate of return, the project's is zero a. b. c. d. payback period. net present value internal rate of return net present value