How to do this with a photo?

Okay so I want to know why my outside photos in raw and shot with my nikon d3000 10.2mp shot with 200 ISO is noisy when I zoom in 100% on my computer.

Also if I want an 8x10 of these photos will it be zoomed into 100% when they are printed?

Well Shoot on the lowest ISO Possible. You should have very little to no noise on a ISO 200.

Do you have an example pic we can look at? I'm thinking it may just be some dust on the sensor your seeing and not true noise.

And as far as the print part. If the image dimensions are only 8x10 inches then yes the 8x10 print will be 100% to scale.