In marissa's calculus course, attendance counts for 5% of the grade, quizzes count for 10% of the grade, exams count for 60% of the grade, and the final exam counts for 25% of the grade. marissa had 100% average for attendance, 93% for quizzes, 86% for exams, and 85% on the final exam. determine marissa's course average.

Attendence counts : 5% value × 100% ( Marissa grade ) = 5%

Quizzes: 10% value × 93% ( Marissa grade )
= 9.3%

Exams : 60% value × 86% ( Marissa grade )
= 49.6%

Final Exam : 25% value × 85% ( Marissa grade)
= 21.25%

Add all the grades:
5 + 9.3 + 49.6 + 21.25 = 85.15

Marrissa's average grade is 85.15%

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