SOLUTION: 8X10 (-9 exponent) IS EQUAL TO 2X10 (-12 exponent) and is also EQUAL TO 0.000000000002 4X10 (3 exponent) MY QUESTION

Algebra ->  Algebra  -> Exponents -> SOLUTION: 8X10 (-9 exponent) IS EQUAL TO 2X10 (-12 exponent) and is also EQUAL TO 0.000000000002 4X10 (3 exponent) MY QUESTION      Log On

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Question 175573This question is from textbook BARRONS ALGEBRA THE EASY WAY
:
8X10 (-9 exponent)
IS EQUAL TO 2X10 (-12 exponent) and is also EQUAL TO 0.000000000002
4X10 (3 exponent)
MY QUESTION:
I THOUGHT THAT DURING DIVISION I NEEDED TO SUBTRACT THE EXPONENT, IN THE EXAMPLE IT HAS ADDED IT, WHY? AND HOW DO I KNOW WHERE TO PUT THE DECIMAL POINT, AND WHERE THE DECIMAL POINT COME FROM?This question is from textbook BARRONS ALGEBRA THE EASY WAY

Answer by stanbon(48508) About Me  (Show Source):
You can put this solution on YOUR website!
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.