## Precalculus: Mathematics for Calculus, 7th Edition

(a) $x\geq0$ (b) $t\lt4$ (c) $a\geq\pi$ (d) $-5\lt x \lt\frac{1}{3}$ (e) $|p-3|\leq5$
(a) $x$ is positive whenever it is greater than or equal to $0$. (b) $t$ is less than 4, meaning we need a "less than" sign - \$