A productivity formula for a student's performance on a basket-weaving examination is g = 12tx – 0.21² – 10x² (t < 10), where g is the score the student can expect to obtain, t is the number of hours of study for the examination, and x is the student's grade-point average. (a) For how long should a student with a 3.0 grade-point average study to score 81 on the examination? (Round your answer to two decimal places.) hr dt for a student who earns a score of 81, evaluate it when x = 3.0. (Round your answer to four decimal places.) dx (b) Find dt hr per grade point dx Interpret the result. Note that this is positive, implying that the required study hour v ---Select--- the grade point average increases. This means that, for a 3.0 student who scores 81 on the examination, a 1.0 grade point is worth hours mor increases ther words, the higher your GPA, the harder you have to study for the test!

A productivity formula for a student's performance on a basket-weaving examination is g = 12tx – 0.21² – 10x² (t < 10), where g is the score the student can expect to obtain, t is the number of hours of study for the examination, and x is the student's grade-point average. (a) For how long should a student with a 3.0 grade-point average study to score 81 on the examination? (Round your answer to two decimal places.) hr dt for a student who earns a score of 81, evaluate it when x = 3.0. (Round your answer to four decimal places.) dx (b) Find dt hr per grade point dx Interpret the result. Note that this is positive, implying that the required study hour v ---Select--- the grade point average increases. This means that, for a 3.0 student who scores 81 on the examination, a 1.0 grade point is worth hours mor increases ther words, the higher your GPA, the harder you have to study for the test!

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter3: Polynomial And Rational Functions

Section3.1: Quadratic Functions And Models

Problem 56E: When a certain drug is taken orally, the concentration of the drug in the patient's bloodstream...

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