Question

what means -3 in this

Answer 1

$\frac{kg}{ {m}^{3} }$

Answer 2

Its mean that......


${kg}^{ - 3} = (- kg) \times( - kg) \times ( - kg)$
Thus , this is your answer and by example I can identify you....

$2kg^{ - 3} = ( - 2kg) \times ( - 2kg) \times (- 2kg) = (- 8kg)$
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