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Let's say we want to find the final grades for 3 girls, and we know...

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Calculus

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Let's say we want to find the final grades for 3 girls, and we know what their averages are for tests, projects, homework, and quizzes.Student Tests Projects Homework QuizzesAlexandra 92 100 89 80Megan 72 85 80 75Brittney 88 78 85 92We also know that tests are 65% of the grade, projects 10%, homework 5%, and quizzes 20%.(A) Create three matrices. One for the categories (table above), one for their weights (sentence above) and one for their final grades. Label rows and columns on all three.(B) What does 78 represent in your matrix above? Be specific.(C) What was Brittney's final grade?

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