Answer
$ b\geq 9$
The graph is shown below.
Work Step by Step
The given inequality is
$\Rightarrow 4b\geq 36$
Divide each side by $4$.
$\Rightarrow \frac{4b}{4}\geq \frac{36}{4}$
Simplify.
$\Rightarrow b\geq 9$
Hence, the solution is $ b\geq 9$.
Use a close circle because $9$ is a solution.
Shade the number line on the right side.
