Question square

3.1 Ratios, Rates, and Proportional Relationships - Scale factors in geometry
0:00

Square A has side lengths that are 166 times the side lengths of square B. The area of square A is k times the area of square B. What is the value of k ?

Enter your answer:

Square A has side lengths that are 166 times the side lengths of square B. The

Hard-difficulty · SAT Math · Ratios, Rates, and Proportional Relationships — Scale factors in geometry. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.

Answer explanation

The correct answer is 27,556 . The area of a square is s 2 , where s is the side length of the square. Let x represent the length of each side of square B. Substituting x for s in s 2 yields x 2 . It follows that the area of square B is x 2 . It’s given that square A has side lengths that are 166 times the side lengths of square B. Since x represents the length of each side of square B, the length of each side of square A can be represented by the expression 166 x . It follows that the area of square A is 166x2, or 27,556 x 2 . It’s given that the area of square A is k times the area of square B. Since the area of square A is equal to 27,556 x 2 , and the area of square B is equal to x 2 , an equation representing the given statement is 27,556 x 2 = k x 2 . Since x represents the length of each side of square B, the value of x must be positive. Therefore, the value of x 2 is also positive, so it does not equal 0 . Dividing by x 2 on both sides of the equation 27,556 x 2 = k x 2 yields 27,556=k. Therefore, the value of k is 27,556 .