Arectangle has an area of 72 in². the length and the width of the rectangle are changed by a scale factor of 3.5.
what is the area of the new rectangle?

For this problem, it can be solved by forming two equations. The first equation is the area of the original rectangle. Let l be the length and w be the width.  l x w = 72 will be 1st equation. Then, the 2nd equation is 3.5l * 3.5w = A. By substitution, the new area, A = 12.25( l x w) = 12.25 (72) = 882 in².

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