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Biology; Chemistry; Physics: Post your doubts here!

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thnx sis :) btw can u tell me the scale fr Q1 graph plx
papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_s10_qp_61.pdf

For x axis you can take 1cm to represent 2 units
And for y axis, squeeze the graph and start from 95 and take the scale 1cm to represent 5 units
 
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hello ppl! cud anyone plz tell me what radioactive isotopes are? i really need help here. my IGCSE exams r starting within 2 days and i feel like i failing chemistryy!!:(
 
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