Find the expression for the mass
The rate of decay in the mass, M, of a radioactive substance is given by the differential equation , where k is a positive constant. If the initial mass was 200g, then find the expression for the mass, M, at any time t.
|1)||M = 200ln(kt)|
|2)||M = 2e-kt|
|3)||M = 200 ekt|
|4)||M = 200 e-kt|