The Total Weekly Sales for a Newly Released Portable Media $$\left\{ \begin{array} { l l } S = 10 x + 70 & \text { PMP1 } \\S = - 10 x + 210 & \text { PMP2 }\end{array} \right.$$

question 271

Multiple Choice

The total weekly sales for a newly released portable media player (PMP) increased each week.At the same time, the total weekly sales for another newly released PMP decreased each week.Models that approximate the total weekly sales S (in thousands of units) for each PMP are $$\left\{ \begin{array} { l l } S = 10 x + 70 & \text { PMP1 } \\S = - 10 x + 210 & \text { PMP2 }\end{array} \right.$$ where x represents the number of weeks each PMP was in stores, with x = 0 corresponding to the PMP sales on the day each PMP was first released in stores.After how many weeks will the sales for the two PMPs be equal

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Poverty Thresholds

The minimum level of income deemed necessary to achieve an adequate standard of living in a specific country or region.

Poverty Line

The lowest amount of money required to maintain a satisfactory quality of life in a particular country.

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A principal agency of the U.S. Federal Statistical System responsible for producing data about the American people and economy.

Family Size

The number of individuals in a household related by blood, marriage, or adoption.