COMBINED VARIATION
EQUATION:
[tex]t = \frac{k {y}^{4} }{ {u}^{2} } [/tex]
where k is the constant of variation.
Learn more:
Combined variation is another physical relationship among variables. This is the kind of variation which involves both direct and inverse variation.
Learn more about combined variation: https://brainly.ph/question/9500210 » https://brainly.ph/question/9158353
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