QuestionThe length, $l$, of a pencil is 13 cm to the nearest centimetre $(\mathrm{cm})$.
What number should go in the box to complete the error interval? $12.5 \mathrm{~cm} \leq l<$ $\square$ cm

Studdy Solution
To find the upper bound, add $0.5$ to the rounded number, but do not include it in the interval. Therefore, the upper bound is $13 + 0.5 = 13.5$ cm.
The number that should go in the box to complete the error interval is:
$\boxed{13.5 \text{ cm}}$