document.write( "Question 176124This question is from textbook BARRONS ALGEBRA THE EASY WAY
\n" ); document.write( ": (4x10^-11)x(7x10^6)=28x10^-5=2.8x10^-4=0.00028\r
\n" ); document.write( "\n" ); document.write( "my question:how does the decimal point get there (2.8) and why has the exponent (10) been decreased? \n" ); document.write( "

Algebra.Com's Answer #131230 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%284x10%5E%28-11%29%29%2A%287x10%5E%286%29%29=28x10%5E%28-11%2B6%29\"$
\n" ); document.write( " $\"%284x10%5E%28-11%29%29%2A%287x10%5E%286%29%29=28x10%5E%28-5%29\"$
\n" ); document.write( "Replace $\"28\"$ with $\"2.8x10%5E1\"$
\n" ); document.write( " $\"%284x10%5E%28-11%29%29%2A%287x10%5E%286%29%29=2.8x10%5E%281%29%2A10%5E%28-5%29\"$
\n" ); document.write( " $\"%284x10%5E%28-11%29%29%2A%287x10%5E%286%29%29=2.8x10%5E%281-5%29\"$
\n" ); document.write( " $\"%284x10%5E%28-11%29%29%2A%287x10%5E%286%29%29=2.8x10%5E%28-4%29\"$
\n" ); document.write( "Traditionally, the coefficient in scientific notation takes on values between 1 and 10. That's why 28 was replaced with 2.8x10^1. But the values are identical, as are all of the values below.
\n" ); document.write( " $\"280x10%5E%28-6%29\"$
\n" ); document.write( " $\"28x10%5E%28-5%29\"$
\n" ); document.write( " $\"2.8x10%5E%28-4%29\"$
\n" ); document.write( " $\".28x10%5E%28-3%29\"$
\n" ); document.write( " $\".028x10%5E%28-2%29\"$
\n" ); document.write( " $\".0028x10%5E%28-1%29\"$
\n" ); document.write( " $\".00028\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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