1. how many significant figures are in each number?\na) 0.020\nb) 2.34\nc) 1000
1. how many significant figures are in each number?\na) 0.020\nb) 2.34\nc) 1000
Answer
Explanation:
Step1: Recall significant - figure rules
Non - zero digits are always significant. Leading zeros are not significant. Trailing zeros after a decimal point are significant.
Step2: Analyze 0.020
The leading zeros (before the 2) are not significant. The 2 and the trailing 0 after the decimal are significant. So, there are 2 significant figures.
Step3: Analyze 2.34
All non - zero digits are significant. So, there are 3 significant figures.
Step4: Analyze 1000
If no decimal point is present, the trailing zeros may or may not be significant. Assuming no additional information, we consider only the 1 as significant. So, there is 1 significant figure.
Answer:
a) 2 b) 3 c) 1