Mathematics
emilyrsalazar
29

You are studying for your final exam of the semester. Up to this point, you received 3 exam scores of 96%, 77%, and 74%. To receive a grade B in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final. Find the widest range of scores that you can get on the final exam in order to receive a grade of B for the class. Use interval notation. A. [67, 100] B. [73, 100] C. [70, 71]

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(1) Answers
latinaberryhill

((96 + 77 + 74 + x) / 4) > 80 (( 247 + x) / 4) > 80 247 + x > 80 * 4 247 + x > 320 x > 320 - 247 x > 73 ((96 + 77 + 74 + x) / 4) < 89 ((247 + x) / 4) < 89 247 + x < 89 * 4 247 + x < 356 x < 356 - 247 x < 109...but since it only goes to 100, I suppose it is 100 answer is B

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