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# Mathematical Applications for the Management, Life, and by James J. Reynolds Ronald J. Harshbarger

By James J. Reynolds Ronald J. Harshbarger

MATHEMATICAL purposes FOR THE administration, lifestyles, AND SOCIAL SCIENCES, ninth variation is meant for a two-semester utilized calculus or mixed finite arithmetic and utilized calculus direction. The book's concept-based procedure, a number of presentation equipment, and engaging and correct purposes retain scholars who regularly take the course--business, economics, existence sciences, and social sciences majors--engaged within the fabric. This version broadens the book's real-life context via including a few environmental technological know-how and financial purposes. using modeling has been extended, with modeling difficulties now sincerely classified within the examples. additionally integrated within the 9th variation is a quick assessment of algebra to arrange scholars with varied backgrounds for the cloth in later chapters.

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70. 55 where t is the number of years past 1940. S. Department of Transportation) (a) Express this equation with radical notation. (b) Does this equation estimate a greater percent change during the decade of the 1970s or during the decade from 2000 to 2010? What might explain this? (c) When can you be certain this equation is no longer valid? Half-life In Problems 71 and 72, use the fact that the quantity of a radioactive substance after t years is given by q ‫ ؍‬q0(2 ؊t͞k), where q0 is the original amount of radioactive material and k is its half-life (the number of years it takes for half the radioactive substance to decay).

Department of Commerce) (a) What t-values correspond to the years 1970, 1990, and 2002? (b) The actual total personal incomes (in billions of dollars) for the years in part (a) were as follows. 9 What does the formula predict for these years? (c) What does the formula predict for the total personal income in 2012? (d) Does this formula seem to indicate that total personal income doubles almost every 10 years? 66. 1626)t where t is the number of years past 1950. (Source: New York Stock Exchange) 19 (a) What t-values correspond to the years 1990, 2000, and 2006?

Use large t-values in the formula to discover this formula’s upper limit. 68. S. 515)Ϫt where t is the number of years past 1995. S. S. households with Internet service for selected years were as follows. 2% For each of these years, use the equation to ﬁnd the predicted percent of households with Internet service. 8%. What percent increase does the equation predict from 2008 to 2011? Why do you think the 2008–2011 change is so different from the 2001–2004 change? (c) Why is it reasonable for a formula such as this to have an upper limit that cannot be exceeded?

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