Final answer:
To evaluate the expression \(\frac{4^x}{2^x}\) for \(x=3\), substitute the value of \(x\) into the expression and simplify the numerator and denominator.
Step-by-step explanation:
To evaluate the expression \(\frac{4^x}{2^x}\) for \(x=3\), we substitute the value of \(x\) into the expression:
\(\frac{4^3}{2^3}\)
Now, we can simplify the numerator and denominator: \(4^3=64\) and \(2^3=8\).
So, \(\frac{4^3}{2^3}=\frac{64}{8}=8\).