## Calculus with Applications (10th Edition)

$x<0\ \$ or $\ \ x\geq 3$
There are two intervals here On the left is an interval containing all numbers less than 0 (but not equal to 0, as the empty circle excludes the endpoint 0). On the right, we have all numbers greater or equal to 3 (note the solid circle indicating inclusion of the endpoint 3 ) A number x from this set can belong to either of the above intervals, so the set shown in the graph can be written using inequalities as $x<0$ or $x\geq 3$.