anonymous
  • anonymous
Simplify the expression, and write answer in scientific notation
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
where is the expression?
anonymous
  • anonymous
\[\left( 4.2 \times 10^{-8} \right) \left( 2.4 \times 10^{5} \right)/ 2.4 \times 10^{3}\]
anonymous
  • anonymous
hold on

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anonymous
  • anonymous
it's suppose to be a fraction (......) over 2.4 blah blah
anonymous
  • anonymous
I see it
anonymous
  • anonymous
the dash is the fraction line, right?
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
Ohhh okay!
anonymous
  • anonymous
yes. thank you <3
anonymous
  • anonymous
Anytime!
anonymous
  • anonymous
ANSWER: 0.0000042 (.000000042)(240, 000) ____________________________ (2400)
anonymous
  • anonymous
lmao what?
anonymous
  • anonymous
Do you know how to find standard notation? And the dashes represent the fraction line.
anonymous
  • anonymous
I divided top over bottom
anonymous
  • anonymous
so what is the final answer?
anonymous
  • anonymous
2400?
anonymous
  • anonymous
ANSWER: 0.0000042
anonymous
  • anonymous
\[{(4.2\times10^{-8})(2.4\times10^{5}) \over 2.4\times10^3}=4.2\times10^{-6}\]
anonymous
  • anonymous
i have to write that answer in scientific notation, that isn't the right answer. it says it's wrong.
anonymous
  • anonymous
OH I'M SORRY. Then you change the answer I gave you to how many zeros are behind 4. AnwarA is correct.
anonymous
  • anonymous
thank you anwara
anonymous
  • anonymous
and thank you OMGirene for the help :]
anonymous
  • anonymous
Oh, no problem! Sorry for making a mistake.
anonymous
  • anonymous
can you explain how you got that pls?
anonymous
  • anonymous
The 2.4 in the top will be cancelled with the one in the bottom. You will be left with 4.8 times some powers of 10's. When you multiply numbers that have the same base you add powers, and when you divide them you subtract powers. So the answer will be \(4.8 \times 10^{-8+5-3}=4.8 \times 10^{-6}\).

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