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Unformatted text preview: triples in 100 years? 9. A radioactive substance with a halflife of 8 days is temporarily implanted in a hospital patient until 3/5 of the original amount remains. How long should the implant remain in the patient? 2 Separation of variables 1. solve y = ay by using the method of separation of variables. 2. solve y = 2 y + 5 by separation of variables. 3. solve y = 2 ty 2 4. solve y = y 3 .e t 5. solve y = e ty with the initial condition that y (0) = 0 1 6. Newton’s law of cooling says that the temperature u ( t ) of an object satisﬁes u =k ( uT ) where T is the constant ambient temperature, and k is a positive constant. Find the temperature of the object at any time. 2...
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This document was uploaded on 04/01/2011.
 Spring '09
 Equations

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