(Originais Teachy 2023) - Question Medium of Mathematics

Let's consider a scientific experiment in which a student measured the mass of a substance with an electronic scale and obtained the result of 12.530 grams. In this context, it is important to understand what are the significant digits and the doubtful digits of this measurement. (a) Identify the doubtful digit(s) in the result, explaining why they are considered doubtful. (b) Write this value in scientific notation. (c) In a discussion among scientists, argue clearly and concisely how doubtful digits can affect the precision of a measurement and the importance of recognizing that every measurement comes with error.