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Select the expression that is equivalent to 3x105+5x108. 15x1013 300,000+500,000,000 15x10-40 300,000x500,000,000
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Apr 13, 2018
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Select the expression that is equivalent to 3x105+5x108.
15x1013
300,000+500,000,000
15x10-40
300,000x500,000,000
Chemistry
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Kartik Anand
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When you're dealing with scientific notation (especially when you use an order of operations such as adding on it), it's important to know that you cannot add 10^2 to 3 (for example).
(3 x 10^5) + (5 x 10^8)
When adding exponents, you're only adding the exponents together and not changing the original number (10).
5 + 8 = 13
We now have a sum of 3x5 x10^13
Multiply 3 by 5 to get your new expression.
3 x 5 = 15
15 x 10^13 is what we're left with.
Your answer is A.)
I hope this helps!
HanClinto
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Apr 17, 2018
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