anonymous
  • anonymous
Write in standard form 6.678x10^2, 9.9673x10^2, 7.02x10^1
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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anonymous
  • anonymous
AFK please help still
anonymous
  • anonymous
I think the book made a typo on these thats why I need help.
anonymous
  • anonymous
back

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asnaseer
  • asnaseer
They all look like they are in scientific notation already
anonymous
  • anonymous
i mean standard form :P silly me
asnaseer
  • asnaseer
if you have some number given as:\[a.bcde\times10^x\]then this just means move the decimal place x number of times to the right. if x was negative, then it means move it x places to the left.
anonymous
  • anonymous
Ummm still kinda confused can you show me this one 6.678x10^2
asnaseer
  • asnaseer
e.g.: |dw:1349822658094:dw|
anonymous
  • anonymous
as an example cause I'm still confused
asnaseer
  • asnaseer
we moved the decimal point 2 places to the right because we have to the power of 2.
anonymous
  • anonymous
but wouldn't the decimal be a comma and how many zeros would be at the end?
asnaseer
  • asnaseer
no - comma's are generally used to group numbers into groups of three - to make them easier to read. e.g.:\[1,376,234.023\]
anonymous
  • anonymous
like 5.9 x 10^2 it would be 590 right?
anonymous
  • anonymous
because those are the only ones in my book like that. the rest are like 5 x 10^11/ 3.4 x 10^3 etc.
asnaseer
  • asnaseer
yes that is correct because: |dw:1349822896694:dw|
anonymous
  • anonymous
yea
asnaseer
  • asnaseer
so if the decimal point needs to move right by more places than you have digits, then you just keep adding zeros to the number
asnaseer
  • asnaseer
another example:
asnaseer
  • asnaseer
|dw:1349823030980:dw|
asnaseer
  • asnaseer
hope it's making sense now
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
yea i see i see :D thank youz :)
asnaseer
  • asnaseer
yw :)
asnaseer
  • asnaseer
\[6.678\times10^2=667.8\]as I showed up above.
anonymous
  • anonymous
so it has no comma
asnaseer
  • asnaseer
you only add extra zeros to the number if the power of ten means it has to go beyond the digits already available
anonymous
  • anonymous
ohhhhhhhhhhhhhhhh ok so these 9.9673x10^2, 7.02x10^1 would have decimals and not commas too?
asnaseer
  • asnaseer
and again, comma's are only used to separate digits into groups of three to make the number easier to read. so if the number has 3 or less digits (before the decimal point), then you would not have any comma. some examples of comma usage: 123.12 1,123.12 12,123.12 1,123,123.12
anonymous
  • anonymous
oh ok :)
asnaseer
  • asnaseer
so strategy is: 1) convert the number from scientific notation to standard form 2) group every 3 digits to the left of the decimal point with comma's

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