35. What is the scale factor if a 6 inch by 6 inch photograph is enlarged to a poster that is 4 ft. by 4 ft.? 4 ft = 48 in O 8 O 1.5 36. How many ml of 60 percent acid should be added to pure acid to make 50 ml of 85 percent acid? 18.75 ml O 1.88 ml O 9.38 ml 37. Rewrite the following expression as a fraction times the variable. -9a