In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Mark has scored 9090, 8686, and 8585 on the first three. What range of scores on the fourth test will give Mark a C for the semester (an average between 7070 and 7979, inclusive)? Assume that all test scores have a non-negative value. Express your answer in interval notation.

In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Mark has scored 9090, 8686, and 8585 on the first three. What range of scores on the fourth test will give Mark a C for the semester (an average between 7070 and 7979, inclusive)? Assume that all test scores have a non-negative value. Express your answer in interval notation.

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter3: Functions

Section3.6: Absolute Value Functions

Problem 41SE: A machinist must produce a bearing that is within 0.01 inches of the correct diameter of 5.0 inches,...

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