Making Object Fit on Arboard

[#1]

I created a new artboard measuring 100 points wide by 60 points high. When I place an image, it's about ten times as big.

Is there a quick way to resize it by width, making it 100 points wide and placing it in precisely in the artboard?

Also, when I'm working on an object in my artboard, it seems to snap into place quite nicely by default. But I sometimes discover that an object is just a bit too wide, or not quite wide enough.

Is there a way to make such an object automatically transform to 100 points in width and fit precisely on the artboard?

[#2]

after you place the image, or if you have drag and dropped the image, it will already be selected.

so you could just type in '100' into your 'W Value' box in the tool bar.