Ordinary Differential Equation

Ordinary Differential Equation

In a chemical reaction, the rate of conversion of a substance S at time t is proportional to the quantity of S remaining untransformed at that instant kx dt dx   , where x is the amount of the substance untransformed at time t . If the amount is 45g at the end of one hour and 15g at the end of 3 hours, find the amount of the substance S present initially. Plot the graph of the function x(t) .
Ordinary Differential Equation