Practice Exercises Transform each expression into rosical form 1) \( 100^{\frac{1}{2}} \) 2) \( 8^{\frac{2}{3}} \) 3) \( \left(\frac{16}{81} \frac{1}{4}\right. \) 4) \( \left(\frac{16}{32}\right)^{\frac{2}{5}} \)

Simplify. \( 9^{\frac{3}{2}} \)

c) \( 5^{0}= \)

c) \( \sqrt[3]{729} \cdot 4^{2}-\sqrt{49} \cdot 5^{0} \cdot 1^{3} \)

The retail flat rate in dollars for first-class mail weighing up to 5 ounces could be computed by the piecewise-constant function \( f \), where \( x \) is the number of ounces. (a) Evaluate \( f(1.1) \) and \( f(4) \). Interpret your results. (b) Sketch a graph of \( f \). What is the domain of \( f \) ? What is the range of \( f \) ?

1a. Calculate the next two terins of each of the following sequences \( \begin{array}{ll}\text { (a) } 11,8,5, \ldots & \text { (d) } 4,9,14, \ldots \\ \text { (c) } 3 \frac{1}{2}, 3 \frac{1}{2}, 7,5,10 \frac{1}{2}, \ldots & \text { (e) } 1,5,9,13, \ldots\end{array} \)