500
One possibility is 5000 ml
There need not be any estimated digit but, if there must be one, then it is the last digit: 3.
Your measurement should include one estimated digit.
An uncertain digit is a digit in a measurement that is estimated or not completely reliable, often due to limitations in the measuring instrument or the precision of the measurement.
0.503..the 3
The last digit in a measurement indicates the level of precision or uncertainty in the measurement. It is typically an estimate and can vary depending on the instrument's precision or the person taking the measurement. The other digits are considered to be more reliable and accurate in conveying the measurement value.
the estimated digit in 0.503 is 3
A pointless exercise! If it has been measured exactly then what is the point of adding one digit which has been estimated?
The significant figures in a measurement include all digits measured exactly, plus one estimated digit.
Yes, but then there is no point in using an instrument that is that accurate!
It includes all of the digits that have been measured exactly, plus one estimated digit.
There need no be any estimated digit.