Answer:
900
Explanation:
When rounding 893 to 3 significant figures, the lower and upper bounds can be determined by looking at the next digit after the third significant figure.
In this case, the next digit after the third significant figure (9) is 3. Since 3 is less than 5, we round down the third significant figure (9) to 8, resulting in 890 as the lower bound.
To find the upper bound, we round up the third significant figure (9) to 10, since the next digit after 9 is 3. However, we need to consider that the digit after 9 is less than 5, so we keep the 9 as the third significant figure and increase the next digit (0) by 1, resulting in 900 as the upper bound.
Therefore, when rounding 893 to 3 significant figures, the lower bound is 890 and the upper bound is 900.