document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1194425>Question 1194425</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve for the indicated value, and graph the situation showing the solution point. The formula for measuring sound intensity in decibels  D  is defined by the equation  D=10log(II0)  using the common (base 10) logarithm where  I  is the intensity of the sound in watts per square meter and  I0=10−12  is the lowest level of sound that the average person can hear. How many decibels are emitted from a jet plane with a sound intensity of  8.1⋅10^2  watts per square meter?\r<BR>\n" );
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document.write( "Round your answer to three decimal places. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #826625 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=826625\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> d = 10*log(I/IO)<BR>\n" );
document.write( "IO = 10^-12.<BR>\n" );
document.write( "therefore:<BR>\n" );
document.write( "d = 10 * log(I/10^-12)<BR>\n" );
document.write( "jet plane has a sound intensity of 8.1*10^2 watts per square meter.<BR>\n" );
document.write( "therefore:<BR>\n" );
document.write( "d = 10*log((8.1*10^2) / 10^-12)<BR>\n" );
document.write( "10^2/10^-12 = 10^(2-(-12)) = 10^(2+12) = 10^14<BR>\n" );
document.write( "therefore:<BR>\n" );
document.write( "d = 10 * log(8.1 * 10^14)<BR>\n" );
document.write( "log(8.1 * 10^14) = 14.90848502<BR>\n" );
document.write( "10 * that = 149.0848502 decibels<BR>\n" );
document.write( "that's the value of d.<BR>\n" );
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