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+clear
+//Given
+t=1500
+N=0.01
+N0=0.999
+
+//Calculation
+//
+T=t*log(N)/log(0.5)
+T1=t*log(N0)/log(0.5)
+
+//Result
+printf("\n (i) Years will reduce to 1 centigram is %0.1f years",T)
+printf("\n (ii) Years will lose 1 mg is %0.2f years",T1)