The annual sales (in billions of dollars) of global positioning system (GPS) equipment from the year 2000 through 2006 follow. (Sales for 2004–2006 were projections.) Here x=0 corresponds to 2000.

$$\begin{array}{lccccccc} \hline \text { Annual Sales, } y & 7.9 & 9.6 & 11.5 & 13.3 & 15.2 & 17 & 18.8 \\ \hline \text { Year, } x & 0 & 1 & 2 & 3 & 4 & 5 & 6 \\ \hline \end{array}$$

Use the equation found in part (c) to estimate the annual sales of GPS equipment for 2005. Compare this figure with the projected sales for that year.

A city's main well was recently found to be contaminated with trichloroethylene, a cancer-causing chemical, as a result of an abandoned chemical dump leaching chemicals into the water. A proposal submitted to city council members indicates that the cost, measured in millions of dollars, of removing x% of the toxic pollutant is given by $C(x)=\frac{0.5 x}{100-x}$ $C(x)=\frac{0.5 x}{100-x}$

Find the cost of removing 50%, 60%, 70%,80%, 90%, and 95% of the pollutant.

Elrod York is paid a 5% commission on all monthly sales. His monthly sales average $82,000. What total commission is he likely to earn for the year?

Suppose a and b are real numbers other than zero and that a>b. State whether the inequality is true or false for all real numbers a and b. $\frac{1}{a}>\frac{1}{b}$

The annual sales (in billions of dollars) of global positioning system (GPS) equipment from the year 2000 through 2006 follow. (Sales for 2004–2006 were projections.) Here x=0 corresponds to 2000.

$$\begin{array}{lccccccc} \hline \text { Annual Sales, } y & 7.9 & 9.6 & 11.5 & 13.3 & 15.2 & 17 & 18.8 \\ \hline \text { Year, } x & 0 & 1 & 2 & 3 & 4 & 5 & 6 \\ \hline \end{array}$$

Plot the annual sales (y) versus the year (x).

Perform the indicated operations and/or simplify each expression. $\left(7 x^2-3 x+5\right)+\left(2 x^2+5 x-4\right)$

Perform the indicated operations and/or simplify the expression.

$$\left( 7 x ^ { 2 } - 2 x + 5 \right) + \left( 2 x ^ { 2 } + 5 x - 4 \right)$$

Metro Department Store’s annual sales (in millions of dollars) during the past 5 years were

$$\begin{array}{lccccc} \hline \text { Annual Sales, } y & 5.8 & 6.2 & 7.2 & 8.4 & 9.0 \\ \hline \text { Year, } x & 1 & 2 & 3 & 4 & 5 \\ \hline \end{array}$$

Using the equation found in part (c), estimate Metro’s annual sales 4 years from now (x=9).

Metro Department Store’s annual sales (in millions of dollars) during the past 5 years were

$$\begin{array}{lccccc} \hline \text { Annual Sales, } y & 5.8 & 6.2 & 7.2 & 8.4 & 9.0 \\ \hline \text { Year, } x & 1 & 2 & 3 & 4 & 5 \\ \hline \end{array}$$

Derive an equation of the line L

Metro Department Store's annual sales (in millions of dollars) during the past 5yr were

Draw a straight line L through the points corresponding to the first and fifth years.

Suppose a and b are real numbers other than zero and that a>b. State whether the inequality is true or false for all real numbers a and b. $a^{2}>b^{2}$

Metro Department Store’s annual sales (in millions of dollars) during the past 5 years were

$$\begin{array}{lccccc} \hline \text { Annual Sales, } y & 5.8 & 6.2 & 7.2 & 8.4 & 9.0 \\ \hline \text { Year, } x & 1 & 2 & 3 & 4 & 5 \\ \hline \end{array}$$

Plot the annual sales (y) versus the year (x).

Rationalize the numerator.

$$\frac { \sqrt [ 3 ] { x ^ { 2 } y } } { 2 x }$$

Rationalize the numerator.

$$\frac { \sqrt [ 3 ] { x ^ { 2 } z } } { y }$$