In a chemical reaction the rate of conversion of a substance Sat time t is propo

In a chemical reaction the rate of conversion of a substance Sat time t is proportional to the quantity of S remaininguntransformed at that instant kx dt dx where x is the amountof the substance untransformed at time t . If the amount is 45g atthe end of one hour and 15g at the end of 3 hours find the amountof the substance S present initially. Plot the graph of thefunction x(t) .