Question 175573
8X10 (-9 exponent) 
IS EQUAL TO 2X10 (-12 exponent) and is also EQUAL TO 0.000000000002
4X10 (3 exponent) 
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Comment: Where do you get these numbers.  What you post
as being equal are not equal.
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8x10^-9 = 0.000000008
2x10^-12 = 0.000000000002
4x10^3 = 4000
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Cheers,
Stan H.