Secondly since i have 3 outputs 2 have the same but only 1 different from both.those 2 values a constant values,how can i combine my two expressions so that it falls within 1 value..if not how can i group my XXX columns so that dog and cat cells merge together.. All replies.
DVD-R's hold 4,700 MB of data, a little more than 7 times that of CD-R's. Higher Order Cost: CD-R's hold fewer photos than DVD-R's. More disks will be needed if your placing a large order. Lower Order Cost: Because DVD-R's hold more photos you will need fewer disks when placing a large scanning order.
To increase the storage capacity even more, a DVD can have up to four layers, two on each side. The laser that reads the disc can actually focus on the second layer through the first layer. Here is a list of the capacities of different forms of DVDs: 1  4.38 GB. 2  2 hours movie time. 3  7.95 GB. 4  4 hours movie time. 5  8.75 GB.