If $10^{4}=10,000$, which is equal to $4 ?$ Select the correct answer below: $\log 100$ $\log 1,000$ $\log 10,000$ $\log 4$ $\log 40,000$ FEEDBACK

Step 1 ：The question is asking for the logarithm base 10 of a number that equals to 4. From the given options, we know that $\log 10,000$ equals to 4 because $10^{4}=10,000$. So, the correct answer should be $\log 10,000$.

Step 2 ：Let's confirm this by calculating the logarithm base 10 of 10,000.

Step 3 ：The output of the calculation is 4.

Step 4 ：Final Answer: The correct answer is $\boxed{\log 10,000}$.