Step 1 :The problem is asking for the value of y when x=6, given that y varies inversely as x^3 and y=12 when x=4.
Step 2 :The formula for inverse variation is \(y = k/x^n\), where k is the constant of variation and n is the power of x.
Step 3 :First, we need to find the value of k when y=12 and x=4. Substituting these values into the formula, we get \(12 = k/4^3\). Solving for k, we find that k = 768.
Step 4 :Then, we can substitute x=6 into the equation to find the new value of y. Using the formula \(y = k/x^3\) and substituting the values we have, we get \(y = 768/6^3\).
Step 5 :Solving this equation, we find that y is approximately 3.56.
Step 6 :Final Answer: The value of \(y\) when \(x=6\) is approximately \(\boxed{3.56}\).