To express: the given quantity in terms of the indicated variable.
The given quantity is “the area of rectangle that is three times as long as it is wide.
w is the width of the rectangle (in feet).
Area of the rectangle is the product of its lengthland widthw is given by .
According to question,length is three times as long as its width.
Thus, area of the rectangle is .
Hence,area of the rectangle is .
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