Higher Paper 2

\begin{aligned} &\text{Rounded to 2 significant figures, the number is } 5.0. \\ &\text{The last significant figure is the tenths.} \\ &\text{Half of } 0.1 \text{ is } 0.05. \\ &\text{So } x \text{ is at least } 5.0 - 0.05 = 4.95 \\ &\text{but less than } 5.0 + 0.05 = 5.05. \end{aligned}