Explanation Given: The number of flights departures F can be approximated by the equation, F = .061 x 2 + 6.09 x + 38.8 x + 1 . Formula used: Formula for solving the quadratic equation a x 2 + b x + c = 0 , where a ≠ 0 , are given by x = − b ± b 2 − 4 a c 2 a Calculation: Consider the provided equation: F = .061 x 2 + 6.09 x + 38.8 x + 1 …… (1) To calculate the year in which number of flights first fall below 8.9 million, substitute 8.9 for F in the above equation (1): 8.9 = .061 x 2 + 6.09 x + 38.8 x + 1 Rearranging the above equation as: 0.061 x 2 + 6.09 x + 38.8 = 8.9 x + 8

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ISBN: 9780134776323

Author: MULLINS

Publisher: PEARSON CUSTOM PUB.(CONSIGNMENT)

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Chapter 1, Problem 96RE

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To calculate: The year in which number of flights first fall below is 8.9 million, if the number (in millions) of flights departures F can be approximated by the equation,F=.061x2+6.09x+38.8x+1.

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Chapter 1, Problem 95RE

Chapter 1, Problem 97RE

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The year in which number of flights first fall below is 8.9 million, if the number (in millions) of flights departures F can be approximated by the equation, F = .061 x 2 + 6.09 x + 38.8 x + 1 .

Solution Summary: The author calculates the year in which number of flights first fall below 8.9 million if the number (in millions) of flight departures F can be approximated by the equation.

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To calculate: The year in which number of flights first fall below is 8.9 million, if the number (in millions) of flights departures F can be approximated by the equation,F=.061x2+6.09x+38.8x+1.

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