State the number of significant figures in the following : (b) 2.64 × 10²⁴ kg
The significant figures of a number are those digits that carry meaning contributing to its measurement resolution. This includes all digits except: 1. All leading zeros; 2. Trailing zeros when they are merely placeholders to indicate the scale of the number (exact rules are explained at identifying significant figures); 3. Spurious digits introduced, for example, by calculations carried out to greater precision than that of the original data, or measurements reported to a greater precision than the equipment supports.(b) Number of significant digit =3
