Reading Time: < 1 minute
Last Updated on May 10, 2023
GMAT OFFICIAL GUIDE DS
Solution:
We need to determine the value of w^-2. We must remember, that if we can determine a value for w, we also can determine a value for w^-2.
Statement One Alone:
w^-1 = ½
We can manipulate the equation in statement one by using the negative exponents rule.
w^-1 = ½
1/w = ½
w = 2
Since we know that w = 2, we have enough information to answer the question, and thus statement one alone is sufficient. We can eliminate answer choices B, C, and E.
Statement Two Alone:
w^3 = 8
We can isolate w by taking the cube root of both sides of the equation w^3 = 8.
Thus, w = 2, and statement two is also sufficient to answer the question.
Answer: D
