Dear Krithika

 You got 70 (out of 100) in the makeup up 

 
Here is what you got wrong

#1 (wrong ans., way and type): -10 points

#2 (wrong ans., right way (but way too complicated, see posted solution)): -5 points

#4 (wrong ans., right way, you did a different problem, namely x^2+y^2 rather than x^2+y^3)
-5 points

#7: right ans. but wrong way (what you did is only applicable if the point is the origin)"
-5 points

#8: wrong ans., partially right way (but again too complicated, that's why you messed up,
see posted solution): -5 points


Since this is higher than 18 (that you got in midterm 1) 
your score is 70

 Best wishes,

  Dr. Z.