Question: In a class in which the final course grade depends entirely on the average of four equally weighted 100 -point tests, David has scored 89,74

In a class in which the final course grade depends entirely on the average of four equally weighted 100 -point tests, David has scored 89,74 , and 90 on the first three. What range of scores on the fourth test will give David a C for the semester (an average between 70 and 79 , inclusive )?

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