A:
This is an easy one, but with lots of 'depends', because it depends on the size of the jpgs. However, even if they were a meg in size (10 very nice 5 x7's would fit on one...but we're going to say "1") . Figure it this way:
a regular cd (700 megs) would hold, 700 pictures, 1 meg each. That would be roughly 2800 jpgs for a gigabite. multiply that x 16. Remember they vary in size. You can get 10 nice size 4x6 pictures on a meg, so multiply 10 x 700 for a cd or, multiply the 2800 x 16 x 10. We can store huge amounts of info.