Chapter 1: Problem 65
Simplify. $$ \left(x^{3} \cdot x^{2}\right)^{2} $$
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Chapter 1: Problem 65
Simplify. $$ \left(x^{3} \cdot x^{2}\right)^{2} $$
These are the key concepts you need to understand to accurately answer the question.
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SOCIAL SCIENCE: Equal Pay for Equal Work Women's pay has often lagged behind men's, although Title VII of the Civil Rights Act requires equal pay for equal work. Based on data from \(2000-2008\), women's annual earnings as a percent of men's can be approximated by the formula \(y=0.51 x+77.2, \quad\) where \(x\) is the number of years since 2000 . (For example, \(x=10\) gives \(y=82.3\), so in 2010 women's wages were about \(82.3 \%\) of men's wages.) a. Graph this line on the window \([0,30]\) by \([0,100]\). b. Use this line to predict the percentage in the year 2020\. [Hint: Which \(x\) -value corresponds to 2020 ? Then use TRACE, EVALUATE, or TABLE.] c. Predict the percentage in the year 2025 .
Can the graph of a function have more than one \(x\) intercept? Can it have more than one \(y\) -intercept?
$$ \text { How do the graphs of } f(x) \text { and } f(x+10)+10 \text { differ? } $$
ATHLETICS: Cardiovascular Zone Your maximum heart rate (in beats per minute) may be estimated as 220 minus your age. For maximum cardiovascular effect, many trainers recommend raising your heart rate to between \(50 \%\) and \(70 \%\) of this maximum rate (called the cardio zone). a. Write a linear function to represent this upper limit as a function of \(x\), your age. Then write a similar linear function to represent the lower limit. Use decimals instead of percents. b. Use your functions to find the upper and lower cardio limits for a 20 -year-old person. Find the cardio limits for a 60 -year-old person.
ECONOMICS: Per Capita Personal Income In the short run, per capita personal income (PCPI) in the United States grows approximately linearly. In 2001 PCPI was \(30.4\), and in 2009 it had grown to \(39.2\) (both in thousands of dollars). a. Use the two given (year, PCPI) data points \((1,30.4)\) and \((9,39.2)\) to find the linear relationship \(y=m x+b\) between \(x=\) years since 2000 and \(y=\mathrm{PCPI}\). b. Use your linear relationship to predict PCPI in 2020 .
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