The value 1042 L rounded to 2 significant digits is 1000 = 1.0 × 10³ L
To round to 2 significant digits :
- Write out the first two digits from the left : 10
- The next digit after the second is rounded to 1 and added to the 2nd digit if it is greater than or equal to 5 else it is rounded to 0
- Since, the third digit is 4 ; we round to to 0 ; including the other succeeding digits ; Hence, we have 1000
1000 could be written in scientific notation as :
- 1000 = 10 × 10 × 10 = 1 × 10³
Therefore, 1042 = 1 × 10³ (2 significant digits)
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