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#1 Help Me ! » help me with this differential question » 2009-07-10 19:06:22

xxzdrxx
Replies: 1

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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