Concept explainers
Application Exercises
The graphs show the percentage of high school seniors who had ever used alcohol or marijuana.
The data can be described by the following mathematical models:
Use this information to solve Exercises 55–56.
a. Use the appropriate line graph to estimate the percentage of seniors who used alcohol in 2014.
b. Use the appropriate formula to determine the percentage of seniors who used alcohol in 2014. How does this compare with your estimate in part (a)?
c. Use the appropriate line graph to estimate the percentage of seniors who used marijuana in 2014.
d. Use the appropriate formula to determine the percentage of seniors who used marijuana in 2014. How does this compare with your estimate in part (c)?
e. For the period from 1990 through 2014, in which year was alcohol use by seniors at a maximum? What percentage of seniors used alcohol in that year.
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EP COLLEGE ALG.MYLAB W/ETEXT -W/ACCESS
- 21–23. Language enrollments. The line graph in Figure 2.28 shows total course enrollments in languages other than English in U.S. institutions of higher education from 1960 to 2009. (Enrollments in ancient Greek and Latin are not included.) Exercises 21 through 23 refer to this figure. 1,800,000 1,629,326 1.522.770 1,600,000 - 1,400,000 - 1347.036 1,200,000- 1,073,097 1,067,217 1,000.000 - 975.7m 963,930 883.222 1.06.603 922,439 960.588 B00,000 - 97.077 877.91 600,000 - 608,749 400.000 - 200,000 - 1960 1965 1968 | 1972 1977 1980 1983 1986 1990 1995 199 2002 2006 2009 1970 1974 Figure 2.28 Crauder, et al., Quantitative Literacy, 3e, © 2019 W. H. Freeman and Company FIGURE 2.28 Enrollments in languages other than English in U.S. institutions of higher education (2009). 21. During which time periods did the enrollments decrease? 22. Calculate the average growth rate per year in enrollments over the two periods 1960–1965 and 2006– 2009. Note that the time periods are not of the same…arrow_forwardanswer A,B,C and Darrow_forwardAmericans' trust in government and the media has generally been on a downward trend since pollsters first asked questions on these topics in the second half of the twentieth century. Trust in government hit an all-time low of 14% in 2014, while trust in the media bottomed out at 32% in 2016. The bar graph shows the percentage of Americans trusting in the government and the media for five selected years. Use this information to answer parts a-c. a. Use the information in the graph to estimate the yearly loss in the percentage of people trusting in government. The yearly loss in the percentage of people trusting in government is 36 %. (Round to the nearest tenth as needed.) b. Write a mathematical model that estimates the percentage, P, of people trusting in government x years after 2003. The mathematical model P = estimates the percentage, P, of people trusting in government x years after 2003. (Use integers or decimals for any numbers in the expression. Use the answer from part (a) to…arrow_forward
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- Hi i’m in grade 12 Data Management and i need help with this practice questionarrow_forward#32 Survey: Customer Loyalty Are customers more loyal in the east or in the west? The following table is based on information from Trends in the United States. The columns represent length of customer loyalty (in years) at a primary supermarket. The rows represent regions on the United States.arrow_forwardTABLE 1.5 The amount of money expended in fiscal year 2009 by the U.S. Department of Defense in various categories is shown in Table 1.5.5 Construct both a pie chart and a bar chart to describe the data. Compare the two forms of presentation. Expenses by Category Category Amount ($ billions) Military personnel 147.3 Operation and maintenance 259.3 Procurement 129.2 Research and development 79.0 Military construction 17.6 Other 4.3 Total 636.7 Source: The World Almanac and Book of Facts 2011arrow_forward
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