If the sides of a square are doubled in length, the area of the original square is now how many times as large as the area of the resultant square?	Choose the correct option.
A) 25 %	B) 50 %	C) 100 %	D) 200 %	E) 400 %

Rationale: let the original square have sides of length l and the new square have sides of length 2 l . the resulting areas are l ^ 2 for the original square and 4 l ^ 2 for the new square ( as the length of the side is square to get the area ) . the original square ' s area is l ^ 2 / 4 l ^ 2 or 25 % of the new square ' s area . choice a
Answer: A