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      Question

      A quantity x varies directly as the square of y. If x =

      75 when y = 5, what is x when y = 8?
      A 148 Correct Answer Incorrect Answer
      B 128 Correct Answer Incorrect Answer
      C 168 Correct Answer Incorrect Answer
      D 192 Correct Answer Incorrect Answer

      Solution

      x = ky┬▓ Given, 75 = k x 25 k = 3 When y = 8: x = 3 x 64 = 192

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