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amusemuse
Group Title
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?
 one year ago
 one year ago
amusemuse Group Title
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?
 one year ago
 one year ago

This Question is Open

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

JayDS Group TitleBest 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)
 one year ago

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

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

kirbykirby Group TitleBest ResponseYou've already chosen the best response.1
Here 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)
 one year ago

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

kirbykirby Group TitleBest ResponseYou've already chosen the best response.1
The 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)
 one year ago

kirbykirby Group TitleBest ResponseYou've already chosen the best response.1
You have ^6 and you introduce ^1 and wrote ^1 and ^6
 one year ago

kirbykirby Group TitleBest ResponseYou've already chosen the best response.1
The point of the example was to show you how to add the exponents together.
 one year ago

amusemuse Group TitleBest ResponseYou've already chosen the best response.0
Oh alright. I got it. Thank you so much!!
 one year ago
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