Final answer:
It is true that in programming, appending the letter 'm' to a constant number denotes it as a decimal. This is crucial for precision in calculations. The use of decimals is also important in the context of significant figures.
Step-by-step explanation:
It is true that one can specify that a constant is of type decimal by appending the letter m to the constant in certain programming languages, such as C#. For example, writing decimal myDecimal = 3.55m; ensures that 3.55 is treated as a decimal, not a double. This is important for maintaining precision in calculations that require a high degree of accuracy.
In the context of significant figures and scientific notation, the rules for determining significant figures apply to decimal values as well. For instance, 117.880m contains six significant figures, and 0.002240g contains four significant figures, showing the application of rules related to decimals and significance.