## Algebra: A Combined Approach (4th Edition)

a. The natural numbers are 1 and 7 b. The whole numbers are 0, 1, and 7 c. The integers are -5, -1, 0, 1, and 7 d. The rational numbers are -5, -1, $\frac{1}{4}$, 0, 1, 7, 11.6 e. The irrational numbers are $\sqrt 7$ and 3$\pi$ f. The real numbers are -5, -1, $\frac{1}{4}$, 0, 1, 7, 11.6, $\sqrt 7$, and 3$\pi$