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Using a calculator can be intimidating at first, especially when dealing with functions like the natural exponential. However, mastering calculator skills is crucial for efficiently solving math problems. First, ensure your calculator is in the correct mode. For this exercise, we need to calculate using the natural base 'e'. Most scientific calculators have a dedicated button, often labeled 'e' or 'exp', which makes this process easier. To compute an exponent with base 'e', you typically enter the exponent (e.g., -0.95) and then use the 'e' function. Check your calculator’s manual if you're unsure of the exact steps, as models can vary slightly. Practicing these calculations will boost your confidence and speed when tackling exponential functions.

Rounding numbers is a basic yet essential skill in mathematics. It allows us to simplify numbers and present them in a more comprehensible form. In this exercise, we need to round numbers to three decimal places. Here’s a quick guide:

• Identify the digit in the third decimal place.
• Look at the digit immediately to the right. If it's 5 or greater, round up by adding one to the identified digit.
• If it's less than 5, keep the identified digit unchanged.

After rounding, ensure the result meets the problem's requirement. This skill not only applies to math tests but also helps in real-world scenarios where precision is needed.

The natural base 'e' is approximately equal to 2.71828. It's a fundamental constant in mathematics, particularly in calculus and exponential functions. The beauty of 'e' lies in its properties, making it useful for describing growth processes like population growth, compound interest, and more. When you see expressions like \( e^{-0.95} \), they represent exponential decay. The exponent (-0.95) indicates how the function changes. Calculating such expressions requires a sound understanding of the properties of 'e' and comfortable use of a calculator. Understanding 'e' not only helps you solve exercise problems but also enhances your grasp of natural logarithms and their applications.