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Mathematics, 02.03.2020 19:19 zeesharpe05
In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, David has scored 81, 92, and 74 on the first three. What range of scores on the fourth test will give David a B for the semester (an average between 80 and 89, inclusive)?Assume that all test scores have a non-negative value.
Express your answer in interval notation.
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In a class in which the final course grade depends entirely on the average of four equally weighted...
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