This question tests area calculation with decimal rounding.
\( \begin{array}{l}\text{A circle has radius 4 cm.}\\ \text{Find its area to 1 decimal place.}\end{array} \)
Choose one option:
Square the radius first, then multiply by π.
Students must correctly square the radius and multiply by π. Higher difficulty involves careful rounding and unit handling. Practising these ensures accuracy for exams and applications involving real-world measurements.
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