need help with b only, pls explain how to do too as this is the first time i enc

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secondary 3 | E Maths
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secondary 3 E Maths Singapore

need help with b only, pls explain how to do too as this is the first time i encounter this qn

Date Posted: 4 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Can't really see the diameter of dna, so I assumed it is 2.

Date Posted: 4 years ago