## Introductory Algebra for College Students (7th Edition)

$\pi$
RECALL: A rational number is a real number that can be expressed as a quotient of two integers. Note that $\pi$, which can be approximated by the decimal $3. 1415926535 89793...$ but cannot be expressed as a quotient of two integers. Thus, one example of a real number that is not a rational number is $\pi$