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OpenStudy (anonymous):
A sample of radioactive substance decreases continuously at the rate of -0.04. if the weight of sample is now 40 grams, what will be weight in 7 days
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ganeshie8 (ganeshie8):
continuous <=> e r = -0.04 A = 40 t = 7
OpenStudy (anonymous):
thankss !! i got it
ganeshie8 (ganeshie8):
\(\large 40*e^{-0.04\times 7}\)
ganeshie8 (ganeshie8):
good :)
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