<span>A.) y = 0.3(2)x
These are exponential decay</span>
The answer is the first one:
bc its not growing by a (-)1/2 and the 3rd one just doesnt make sense
Exam + Tests + Quizzes + HW + Projects = 90
Exam = 10% * grade (x) = 0.1 * x
Tests = 50% * 85 = 0.5 * 85 = 42.5
Quizzes = 15% * 95 = 0.15 * 95 = 14.25
HW = 15% * 98 = 0.15 * 98 = 14.7
Projects = 10% * 92 = 0.1 * 92 = 9.2
Exam + Tests + Quizzes + HW + Projects = 90
(0.1 * x) + 42.5 + 14.25 + 14.7 + 9.2 = 90
(0.1 * x) + 80.65 = 90 (subtract 80.65 from each side)
(0.1 * x) = 9.35 (divide 0.1 from each side)
(0.1 * x)/0.1 = 9.35/0.1
x = 0.935
The answer is 93.5%
