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  3. on two examinations, you have grades of 87 and 88.

On two examinations, you have grades of 87 and 88. There is an optional finalexamination,...

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On two examinations, you have grades of 87 and 88. There is an optional finalexamination, which counts as one grade. You decide to take the final in order toget a course grade of A, meaning a final average of at least 90.a. What must you get on the final to earn an A in the course?b. By taking the final, if you do poorly, you might risk the B that you have in thecourse based on the first two exam grades. If your final average is less than 80,you will lose your B in the course. Describe the grades on the final that will causethis to happen.a. You must get at least a

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