Answer:
11000
Step-by-step explanation:
85.3 has 3 significant figures
21.489 has 5 significant figures
0.0059 has 2 significant figures ( as zeros on the left are not significant)
The answer is always rounded off to the least number of decimal places given in the question. Here the least number is two significant figures.
Therefore;
(85.3 - 21.489)/0.0059
= (63.811)/0.0059
= 10815.42
As we have to round off the answer to two significant figures:
= 11000