The topics in this short chapter involved much of the material studied earlier in this book, including functions, domain and range, exponential functions, area and integration, improper integrals, integration by parts, and numerical integration. For the following special probability density functions, give

(a) The type of distribution;
(b) The domain and range;
(c) The graph;
(d) The mean and standard deviation;

(e) P(μ - σ  ≤ X ≤ μ + σ).

ƒ(x) = e^-x for x in [0, ∞)