Explanation Result used: 1. Let a and b are x- intercept points and if the parabola is open upward and f ( x ) > 0 , then the solution of the inequality is x < a or x > b . 2. Let a and b are x- intercept points and if the parabola is open upward and f ( x ) < 0 , then the solution of the inequality is a < x < b . Calculation: The number of postsecondary degrees earned is given by the function y = 3.980 x 2 − 17.597 x + 2180.899 where x is the number of years after 1990. Let x = 0 represents the year 1990. An inequality which gives the number of postsecondary degrees earned be less than 3500 thousand is, 3.980 x 2 − 17.597 x + 2180.899 < 3500 . Find the intersection of y = 3500 and 3

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ISBN: 9780134179926

Author: HARSHBARGER

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Chapter 4, Problem 41RE

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The years for which the number of postsecondary degrees earned would be less than 3500 thousand.

Solution Summary: The author explains how the number of postsecondary degrees earned is given by the function y=3.980x2-17.597x+2180.8993500.

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