Write in standard form 6.678x10^2,
9.9673x10^2, 7.02x10^1

- anonymous

Write in standard form 6.678x10^2,
9.9673x10^2, 7.02x10^1

- schrodinger

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- anonymous

AFK please help still

- anonymous

I think the book made a typo on these thats why I need help.

- anonymous

back

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## More answers

- asnaseer

They all look like they are in scientific notation already

- anonymous

i mean standard form :P silly me

- 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

Ummm still kinda confused can you show me this one 6.678x10^2

- asnaseer

e.g.:
|dw:1349822658094:dw|

- anonymous

as an example cause I'm still confused

- asnaseer

we moved the decimal point 2 places to the right because we have to the power of 2.

- anonymous

but wouldn't the decimal be a comma and how many zeros would be at the end?

- 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

like 5.9 x 10^2 it would be 590 right?

- 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

yes that is correct because:
|dw:1349822896694:dw|

- anonymous

yea

- 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

another example:

- asnaseer

|dw:1349823030980:dw|

- asnaseer

hope it's making sense now

- anonymous

oh ok

- anonymous

yea i see i see :D thank youz :)

- asnaseer

yw :)

- asnaseer

\[6.678\times10^2=667.8\]as I showed up above.

- anonymous

so it has no comma

- 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

ohhhhhhhhhhhhhhhh ok so these 9.9673x10^2, 7.02x10^1 would have decimals and not commas too?

- 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

oh ok :)

- 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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