Question

multiple choice question
the significant figures in a measurement such as 23.45 kg include
o three certain digits and one uncertain digit.
o only the last digit that is certain.
o two digits to the right of the decimal point that are certain.
o three valid digits.

Explanation:

In a measurement like 23.45 kg, the digits 2, 3, and 4 are certain, and the digit 5 is uncertain. Significant - figures include all certain digits and the first uncertain digit.

Answer:

A. three certain digits and one uncertain digit.