Final answer:
To convert 8.9 g to dag, divide 8.9 by 10. The correct answer is 0.89 dag.
Step-by-step explanation:
To convert grams to decagrams (dag), you need to know the conversion factor between those two units. The conversion factor between grams and decagrams is 1 dag = 10 g.
So, to convert 8.9 g to dag, you can divide 8.9 by 10:
8.9 g รท 10 = 0.89 dag
Hence, the correct answer is b) 0.89 dag.