3.10 Exercises 71 (d) Compare the savings in these two scenarios (move from four

Question

3.10 Exercises 71 (d) Compare the savings in these two scenarios (move from four nines to five, or from five nines re likely to be worth the cost? (The web posting discusses the estimated costs of these upgrades, and compares them to the savings, but that's more complex quantitatively than what we can do in this book Exercise 3.10.19. [R][WI[S][Section 3.3]Goal 3.2][(Goal 3.3] How many master's degrees? ter's degrees in education were awarded in the United States, and that this represented 27% of .) The National Center for Educational Statistics reported that in 2008-2009, 178,564 mas- all master's degrees awarded. [R98] How many master's degrees were awarded in 2008-2009? (a) Make a quick back-of-an-envelope estimate for the answer (b) Calculate to find a more precise result, appropriately rounded. (c) Compare your estimate and your calculation. Exercise 3.10.20. [S][Section 3.3][Goal 3.3] Rent in Boston. According to a survey conducted in spring 2006 by Northeast Apartment Advisors, an of 3.6 percent from 2005. What was the average monthly rent in 2005? Exercise 3.10.21. [R][S][Section 3.3][Goal 3.3] Counting birds. Acton, MA research firm, the average monthly rent in Greater Boston was $1,355, an increase

Explanation / Answer

3.10.20)

Rent = 1355 is an increase of 3.6 % from 2005

Lets assume average rent in 2005 : 100X

So in 2006 (After 3.6% increase ) Average rent : 103.6X = 1355

X = 1355/103.6

So in 2005 = 100X

= 100 (1355/103.6) = 1307.915

2005 Average monthly rent = $ 1307.915

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