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An old house in Boxerville measures 30 feet in height and has windows 5 feet width. An architecture student builds a proportional model that is 3 feet high. How wide are the models windows, in feet?

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[tex]x-width\ of\ models\ windows\\\\From\ proportion:\\\\\frac{30}{5}=\frac{3}{x}\\\\30\cdot\ x=5\cdot3\\\\30x=15\ \ \ \ |:30\\\\x=0.5\\\\Models\ windows\ are\ 0.5ft\ wide.[/tex]