Ned got an overall grade of 86 percent because if each question is 4 points, then 6×4=24 but if he got a bonus 10 points, then you can do 24-10=14 and then you do 100-14 which equals your answer: 86.
Sin Q = oppo. / hypo
sin Q = 9/15
sin Q = 0.6
The answer is A. Good luck man!! :)
