How can you find out which application the Finder will use to open a specific...

Select the document icon in the Finder, choose Get Info from the File menu, and click the disclosure triangle next to

"Open with" in the Info window to reveal the selected application in the pop-up menu.

Select the document icon in the Finder, and choose Show Default Application from the File menu.

Control-click the document icon in the Finder, and choose Show Application from the shortcut menu.

Select the document icon in the Finder, choose Show Inspector from the File menu, click Application Bindings in the Inspector window, and scroll to locate the selected application in the pop-up menu.