Oil field operators can use several practical equations for calculating flow rates of natural gas through venturi gas-lift valves. For critical flow, this analysis derived such equations from a ...

IRR measures the rate needed to break even on an investment. Calculate IRR by setting NPV to zero and solving for the discount rate. Use Excel's IRR function by inputting initial cost and cash inflow.

When thinking mathematically, most people think in proportions. For example, if someone is baking cookies and they want to make a double batch, they intuitively know they need to double the amount of ...

Calculating the IRR for a project with an initial outlay and single cash flow is very easy to do. It's also very practical for measuring the returns on investments in collectibles, commodities, ...