Step by step: Since we are writing a proportion it will look like this ..... 33/1.5 = x/3.5 ( 33 over 1.5 and x over 3.5)
Now that we have our proportion , you cross multiply..... 33 x 3.5 = 115.5 “X” x 1.5 = 1.5x So now you will have an equation that looks like this....... 1.5x=115.5 Once you have that then you divide 1.5 from each side , then after that then you should have x=77 So it takes 77 CD’s to be in a 3.5 inch high stack . Hoped this helped , if it didn’t I apologize Good luck
