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2. (a) (b) The weight of a radioactive substance remaining after t years is given by -0.04t W=1000x2 grams. 1 Show that t= - log₂ ( 0.04 W 1000 Hence or otherwise, find the time required for the weight to reach (II) 0.001 grams. (I) 20 grams

2. (a) (b) The weight of a radioactive substance remaining after t years is given by -0.04t W=1000x2 grams. 1 Show that t= - log₂ ( 0.04 W 1000 Hence or otherwise, find the time required for the weight to reach (II) 0.001 grams. (I) 20 grams

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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2. (a) (b) The weight of a radioactive substance remaining after t years is given by -0.04t W=1000x2 grams. 1 W Show that t=- log₂ 0.04 1000 Hence or otherwise, find the time required for the weight to reach 20 grams 0.001 grams. (I) (II)
Transcribed Image Text:2. (a) (b) The weight of a radioactive substance remaining after t years is given by -0.04t W=1000x2 grams. 1 W Show that t=- log₂ 0.04 1000 Hence or otherwise, find the time required for the weight to reach 20 grams 0.001 grams. (I) (II)
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