It’s a Natural (Guided Practice)
The natural base, e, is an irrational number that approaches 2.71828…. An exponential function with base e is called a natural base exponential function, y = ex. Most calculators have an ex function for evaluating natural base expressions. Use a calculator to evaluate each expression to four decimal places. 1. e2 ≈ 7.3891
2. e−1.3 ≈ 0.2725
3. e5 ≈ 148.4132
4. e−2.2 ≈ 0.1108