To calculate the antilogarithm (antilog) of a number with a bar notation, we first need to interpret and then compute it step by step.

1. Bar notation: The bar in front of the number usually signifies that it's a logarithm of a number less than 1. Therefore, bar 2.0195 represents the logarithm $-2.0195$. We will treat this as $-2.0195$.

2. Antilogarithm: The antilog of a number $x$ is simply $10^x$.

So, we need to compute: $\text{antilog}( -2.0195) = 10^{-2.0195}$

Now, let's compute it.

$10^{-2.0195} \approx 0.009561$

Thus, the antilog of $\text{bar} 2.0195$ is approximately 0.009561.

Would you like a deeper explanation or help with anything else?

Here are some related questions you might find helpful:

1. How does bar notation work in logarithms?
2. What is the difference between common logarithms and natural logarithms?
3. How do you calculate logarithms and antilogarithms manually?
4. What are some real-life applications of logarithms?
5. How does the antilog relate to exponential functions?

Tip: Remember, when working with logarithms, bar notation helps simplify dealing with negative logarithms.