To find \( \log x^4 \) using the power rule, we can apply the logarithmic identity that states \( \log a^b = b \log a \).
Given: \[ \log x = 0.25 \]
We can rewrite \( \log x^4 \) using the power rule:
\[ \log x^4 = 4 \log x \]
Substituting the value of \( \log x \):
\[ \log x^4 = 4 \cdot 0.25 \]
Now, calculate \( 4 \cdot 0.25 \):
\[ 4 \cdot 0.25 = 1 \]
Therefore:
\[ \log x^4 = 1 \]
So, the final answer is:
\[ \log x^4 = 1 \]