SOLUTION: simply expression (7x10^7)(5x10^-5)

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Question 664073: simply expression (7x10^7)(5x10^-5)
Answer by ReadingBoosters(3246) About Me  (Show Source):
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Knowing 10%5E-5+=+%281%2F10%5E5%29
The problem can be rewritten as:
%287x10%5E7%29%2A%285x10%5E-5%29+=+%285%287x10%5E7%29%2F10%5E5%29
When dividing exponents, you subtract them
%2810%5E7%29%2F%2810%5E5%29 is like 7-5 = 2
So,
%285%287x10%5E7%29%2F%2810%5E5%29%29+=+%285%287x10%5E2%29%29+=+35x10%5E2+=+3500
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