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#1 2009-07-10 19:06:22
- xxzdrxx
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- Registered: 2009-07-10
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help me with this differential question
a material decays at a rate proportional to its mass. there are 200mg of it initially, 5hours later, it lost 10% of the original mass. let m denote the mass of remaining at anytime t. write the differential equation which describes the rate of change of m with respect to t.
can it be t(-dm/dt)+m=200 ?
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#2 2009-07-10 19:15:21
- Identity
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- Registered: 2007-04-18
- Posts: 934
Re: help me with this differential question
When t = 0, m = 200
When t = 5, m = 180
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