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

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(75887) (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)
---------------
Comment: Where do you get these numbers. What you post
as being equal are not equal.
---------------
8x10^-9 = 0.000000008
2x10^-12 = 0.000000000002
4x10^3 = 4000
======================
Cheers,
Stan H.
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