17 miles = 27.3 km
49 miles = 78.8 km
12 inches = 30.5 cm

You're welcome.

I set up a Linux Mint distro for my technophobic mom 5 years ago and she used it daily without any trouble.

What I did though:

_ Set a wallpaper she likes.
_ Remove all the icons/shortcut but the ones she really needs (Chromium, Skype, Rythmbox for music and a folder to all the movies i got for her)
_ Set Google, gMail and Youtube bookmarks in Chromium.

_ And most important: DESACTIVATE THE AUTO UPDATE ! Nothing worry a non-techy more that unexpected popup. And why update something that already works ?