Exercises: in context For functions in geometric contexts and real-world contexts, the domain and range are limited by which values would make sense in the context. See p. 82 Example 3c. 6. Find the domain and range of each function. a. function A(n) = (n -2) . 180 which gives the angle sum of an n-sided polygon b. function T(x) = 0.0625 x which gives the Massachusetts sales tax on an Sx purchase