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25 May, 11:53

The quantity q varies inversely with the square of m and directly with the product of r and x. When q is 2.5, m is 4 and the product of r and x is 8. What is the constant of variation?

5/8

5/4

5

10

+3
Answers (1)
  1. 25 May, 12:04
    0
    Q = k * (r*x) / m^2 ⇒ k = q*m^2 / (r*x)

    k = 2.5 (4) ^2 / 8 = 5

    Answer: 5
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