study_ing
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when 10 to the power 9, organisms are added, A drug killed 90% organism in 10 min
after how much time organism conc become <10?
a)10 min
b)50 min
c)100 min
d)150 min
e)200 min
f)500 min
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| muzammil
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c
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| muzammil
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?
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| study_ing
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i really dunno the answer..was hoping we cud have some input on this one
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| robin082006
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C
this has been discussed
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| docswapna
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robin can u plz post the link where this question was discussed. txs..
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| muzammil
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well i can try to explain after 10 min 10% of organism will be left. now to begin wiht the organism are 10 power 9 now 10% of it is 10 power 8. after next 10 min 10% of 10 power 8 will be left which is 10 power 7 so after every 10 min 10 power decreases untill after 80 min it becomes 10 power 1 which is 10 and after that the count becomes less than 10 so the nearest option is 100. i used logic correct me if iam wrong
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| study_ing
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seems logical ..
cant find the old thread, robin cud u plz help us out
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| ing
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http://www.prep4usmle.com/forum/comments.php?id=3...
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| tolito
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yes muzamil
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