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if r varies directly as s and inversely as the square t, and r=4 when s=20 and t=5, find
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NICOROBIN2588GO

Answer:

find what po?

let k be the constant of variation

[tex]r(4) = \frac{ks(20)}{ {t(5)}^{2} } [/tex]

[tex]4 = \frac{k20}{25} [/tex]

100=k20

100/20=k

5=k

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