Dear Yash

Your score in Exam 2 is 90 out of 100

Everything was right except

#2: right way but wrong answer (I  have no clue
how you got it, Maple gives a different answer)
: -4 points

#9: Partially right way, BUT the region of
integration in the xy-plane is x^2+y^2=9
NOT what you had, AND you did not multiply by
-1 (Downward direction)
: -6 points

Best wishes,

  Dr. Z.