You must show your work when you are given the option to or you will only recieve half credit for correct answers with no work. Questions 6,7,8,9,10,12,13,14,15,16,17,18,19,20,21,22,23,24,26,28,30,32, and 34 require that you show your work. You can either sketch your work digitally or use the image option to upload an image of your hand written work.
