How do you determine the dpi on a photo in a PDF document?

Many folks use Adobe's Acrobat to share reports, images, and video. Often times, we're asked to extract the images from a PDF file for use elsewhere. Depending on the downsampling settings, the images in a PDF might not work well outside of the document.

Here's how to check the resolution of the image within the PDF file.

If you have Acrobat Pro, you can use the Object Inspector in Output