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+//scilab 5.4.1
+//Windows 7 operating system
+//chapter 9 Basic Voltage and Power Amplifiers
+clc
+clear
+V=10//V=voltage at frequency 5kHz
+Vr=7.07//Vr=voltage at frequency 25kHz
+//x=10*log10(P/Pr) where x=change in decibel(dB) of power P from some standard power Pr
+//P=V^2/R=I^2*R 
+//Also Pr=Vr^2/R=Ir^2*R
+//x=10*(log10(V/Vr))^2=20*log10(V/Vr)
+x=20*log10(V/Vr)//x=change in decibel(dB) of voltage V from some standard voltage Vr
+format("v",4)
+disp("dB",x,"The decibel change in the output power level is =")