6. Here are Marilyn's test scores in mathematics for the semester: 78, 74, 85, 88, 93, 96, 98, and 100. If she needs a mean score of 90 to receive an A, what must she score on the final test? Write an inequality to solve this problem.
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Post-Lab Questions
Review your data. Did your experiment support your hypothesis? Explain your answer.
What role does voltage play in the formation or use of an electromagnet?
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Since the student's average test score on 4 tests is 78, then the sum of the first 4 test scores is 4×78=312. We need the sum of ALL 5 scores to be 5×80=400, so if  is the 5th test score, then.312+x=400 therefore x=88
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