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12.5% of an isotope remains after 8 years from the initial stage. After 8 more years the quantity persent will be?



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sauravshakya
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first find half life.can u?

sauravshakya
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@Yahoo!

Yahoo!
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Let me try

Tomas.A
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it... will... be...
posted in physics group

sauravshakya
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@Yahoo! u there

Yahoo!
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nop....it is maths question ... in sequence and series

Tomas.A
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lol ok

Yahoo!
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No ... Idea

sauravshakya
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First dw:1344690805456:dw

sauravshakya
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here x is the initial amount of the isotope

sauravshakya
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can u find common ratio.......

sauravshakya
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or u can do it as dw:1344690939900:dw

sauravshakya
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dw:1344690979564:dw

sauravshakya
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dw:1344691068840:dwnow find

sauravshakya
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can u? @Yahoo!

Fellowroot
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ganeshie8
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\(.125 = e^{8r}\)

ganeshie8
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@Fellowroot has it !

sauravshakya
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dw:1344691170393:dw

jcyogi
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people this girl needs help > tafara27

sauravshakya
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so the answer is 1.56 percent

sauravshakya
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can also be done using simple maths......

sauravshakya
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do u want me to do that? @Yahoo!

Yahoo!
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@sauravshakya the answer should be 25/16 %

sauravshakya
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dw:1344692147133:dw

Yahoo!
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hw did u get that

Yahoo!
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i got it thxxx

sauravshakya
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ok.....

sauravshakya
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welcomx