algebra 2

If Q varies inversely as the square root of R and Q=2 when R=4, what is Q when R is 25?

does Q=625
im not sure can someone double check it for me.

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asked by tom
  1. Q = k/sqrt(R) = 2,
    k / sqrt(4) = 2,
    k = 2*sqrt4 = 2*2 = 4.

    Q = k/sqrt(R) = 4/sqrt25 = 4/5.

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    posted by Henry

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