Exactly as in the question.
It is already written in numeric form!
5,000,000
470 = CDLXX
00610418452911
28" or 2'4"
6' 3"
If the number is accurate to two decimal places then you write it exactly as in the question.
You cannot. Inches are a measurement unit; here is no intrinsic numerical value.
To write an annual income in numeric format, you would simply state the total amount of money earned in a year. For example, if someone earns $50,000 in a year, you would write it numerically as "50,000." To ensure clarity, you can also specify the currency (e.g., $50,000 USD).
75 km is a good enough numeric format.
It is 21878.92, exactly as in the question.
The numeric or standard format is 125,000