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amusemuse
 3 years ago
So, my textbook taught me in one of the steps add the exponents.
For example:
1.5 x 10^1 * 10^7
1.5 x 10^6
But, a problem of mine I have completed just got me confused because the answer I got isn't any of the answers available. It's a multiple choice. Here is my problem:
(2.5 x 10^9) (1.5 x 10^3) = (2.5 * 1.5) (10^9 * 10^3)
= 3.75 * 10^6
= 3.75 x 10^1 * 10^6
= 3.75 x 10^5
Did I do something wrong? If so can someone explain this to me?
amusemuse
 3 years ago
So, my textbook taught me in one of the steps add the exponents. For example: 1.5 x 10^1 * 10^7 1.5 x 10^6 But, a problem of mine I have completed just got me confused because the answer I got isn't any of the answers available. It's a multiple choice. Here is my problem: (2.5 x 10^9) (1.5 x 10^3) = (2.5 * 1.5) (10^9 * 10^3) = 3.75 * 10^6 = 3.75 x 10^1 * 10^6 = 3.75 x 10^5 Did I do something wrong? If so can someone explain this to me?

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tomo
 3 years ago
Best ResponseYou've already chosen the best response.0why did you add a 10^1 in the 3rd line of your equations.

JayDS
 3 years ago
Best ResponseYou've already chosen the best response.0= 3.75 * 10^6 (this is without what @tomo said, u don't need the extra 10^1 which you added)

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.1Ya you can't introduce the extra 10^1... (unless you did it to both sides of the equality)

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.1However, it would be correct if you wrote = 3.75 x 10^1 * 10^7

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.1Here you are breaking up the exponents. Like what your book example did (But this is not necessary to write because it is a longer expression)

amusemuse
 3 years ago
Best ResponseYou've already chosen the best response.0I addede the 10^1 because that's what my textbook said to do. So, I don't need to do that?

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.1The book didn't "add" the extra 10^1.. if you look carefully; the first is exponent ^6, then they write ^1 and ^7 (NOT ^6)

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.1You have ^6 and you introduce ^1 and wrote ^1 and ^6

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.1The point of the example was to show you how to add the exponents together.

amusemuse
 3 years ago
Best ResponseYou've already chosen the best response.0Oh alright. I got it. Thank you so much!!
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