document.write( "Question 131555: Hi the chapter im on is called Exponential and Logarithmic functions. I had a question on a word problem from it.\r
\n" ); document.write( "\n" ); document.write( "Here it is:
\n" ); document.write( "The voltage input of an amplifier is 0.5 volts. Its voltage output is 52 volts. Use the formula d=10log(E base 0/E base 1), where d is the decibel voltage, E base 0 is the output voltage, and E base 1 is the input voltage to find the decibel voltage.\r
\n" ); document.write( "\n" ); document.write( "Okay this question makes no sense to me so if someone can figure it out.. Thank u!
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Algebra.Com's Answer #96033 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
You are misinterpreting the \"E%5Bo%5D\" and the \"E%5Bi%5D\"
\n" ); document.write( "The little \"o\" and \"i\" are not bases, they are called
\n" ); document.write( "subscripts. All a subscript does is give you a way to
\n" ); document.write( "narrow the definition of a variable.
\n" ); document.write( "Example:
\n" ); document.write( "Suppose \"R\" is the rent I charge for apartments
\n" ); document.write( "Maybe I use \"R\" in a formula, but I want to know
\n" ); document.write( "if the rent is for a 1-bedroom, 2-bedroom, or 3-bedroom
\n" ); document.write( "\"R%5B1%5D\"= rent is for a 1-bedroom
\n" ); document.write( "\"R%5B2%5D\"= rent is for a 2-bedroom
\n" ); document.write( "\"R%5B3%5D\"= rent is for a 3-bedroom
\n" ); document.write( "Just realise that sometimes little numbers do refer to
\n" ); document.write( "the base for a log, just not in this case
\n" ); document.write( "\"E%5Bi%5D+=+.5\" volts (\"E%5Bi%5D\" is voltage in)
\n" ); document.write( "\"E%5Bo%5D+=+52\" volts (\"E%5Bo%5D\" is voltage out)
\n" ); document.write( "\"d+=+10%2Alog%2810%2C%28E%5Bo%5D%2FE%5Bi%5D%29%29\"
\n" ); document.write( "\"d+=+10%2Alog%2810%2C%2852%2F.5%29%29\"
\n" ); document.write( "\"d+=+10%2Alog%2810%2C104%29\"
\n" ); document.write( "\"d+=+10%2A2.017\"
\n" ); document.write( "\"d+=+20.17\" answer
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