When a square with area 16 is dilated by a scale factor of k, we obtain a square with area 25. If the side length of the second square is 5, then find the side length of the first square.
The first square has area 16, so its side length is \({\sqrt{16}} = 4\)
The second square has area 25, so its side length is \({\sqrt{25}} = 5\)
The problem asks for the side length of the first square, which is 4.
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