Chapter 1 - Equations and Inequalities - 1.8 Absolute Value Equations and Inequalities - 1.8 Exercises - Page 168: 71

$|p-9| \le 0.0001$

RECALL: $|a-b|$ represents the distance between the real numbers $a$ and $b$. Thus, the distance between $p$ and $9$ is represented by $|p-9|$. Since the distance is within (less than or equal to) $0.0001$ units, then the required inequality is: $|p-9| \le 0.0001$